DE1028594B - Process for the treatment of agricultural cultivated soils and for the promotion of plant growth - Google Patents
Process for the treatment of agricultural cultivated soils and for the promotion of plant growthInfo
- Publication number
- DE1028594B DE1028594B DEB42896A DEB0042896A DE1028594B DE 1028594 B DE1028594 B DE 1028594B DE B42896 A DEB42896 A DE B42896A DE B0042896 A DEB0042896 A DE B0042896A DE 1028594 B DE1028594 B DE 1028594B
- Authority
- DE
- Germany
- Prior art keywords
- promotion
- plant growth
- treatment
- cultivated soils
- agricultural cultivated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 4
- 230000008635 plant growth Effects 0.000 title description 3
- 241000196324 Embryophyta Species 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 241000238631 Hexapoda Species 0.000 claims description 4
- 241000233866 Fungi Species 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229920003180 amino resin Polymers 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000003337 fertilizer Substances 0.000 claims 1
- 239000000575 pesticide Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 239000010871 livestock manure Substances 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 241000282465 Canis Species 0.000 description 1
- 235000003801 Castanea crenata Nutrition 0.000 description 1
- 244000209117 Castanea crenata Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000016936 Dendrocalamus strictus Nutrition 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N61/00—Biocides, pest repellants or attractants, or plant growth regulators containing substances of unknown or undetermined composition, e.g. substances characterised only by the mode of action
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/02—Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Agronomy & Crop Science (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catching Or Destruction (AREA)
Description
Verfahren zur Behandlung landwirtschaftlicher Kulturböden und zur Förderung des Pflanzenwachstums Das 1'flarizeriw#aclisttim ist nicht nur abhängig von Wasser. Nährstoffen, Wärme und Licht. sondern auch in starkem lIallle von der Bodenstruktur. DerWechsel von hegen und Sonnenschein führt leicht zur Verkrustung des Bodens und damit zu Wachstumshemmungen. Der Erhaltung 1.7w. Verbesserung der l)'o,denstrul:tur dient die mechanische Bodenbearbeitung und die Zufuhr organischer Stoffe, wie Stallmist, "Dorf und Gründünger, die in den Boden eingearbeitet werden. Es ist auch bekannt, die Bodenstruktur dadurch zu verbessern, daß Chemikalien, wie Kalk Oder Polvnieris.ttionspro@dulcte, z. B. Polya.crylverbin-<htngen, oder auch kleinstückige gehärtete Kon.den-,-ttiorisprodulcte. z. B. kleinteilige gehärtete Harnstoff-Forma.ldelivd-tla.rze, bis zttr Wurzeltiefe mit der Ackererde vermischt werden.Process for the treatment of agricultural cultivated soils and for Promotion of plant growth The 1'flarizeriw # aclisttim is not only dependent of water. Nutrients, warmth and light. but also in a strong sense of the Soil structure. The alternation of cherishing and sunshine easily leads to incrustation of the soil and thus inhibits growth. Conservation 1.7w. Improvement of l) 'o, denstrul: tur serves the mechanical tillage and the supply of organic ones Substances such as manure, village and green manure that are worked into the soil. It is also known to improve soil structure by using chemicals such as Kalk Or Polvnieris.ttionspro@dulcte, e.g. B. Polya.crylverbin- <htngen, or small-sized hardened cones -, - ttiorisprodulcte. z. B. small-scale hardened Urea-Forma.ldelivd-tla.rze, mixed with the soil up to the root depth will.
Fs wurde nun gefunden, daß mau landwirtschaftliche Kulturböden nach der üblichen Vorbereitung und Einsaat wirksam gegen die Verschlechterung ihrer Struktur schützen und das Pflanzeaiwac:hsturn fördern sowie die Entwicklung von Unkraut, Pilzen und Insekten verhindern kann, wenn man die Bodenobe.rfläche: mit einer Schicht aus porösen. Kunstharzen, insbesondere aus härtharen. Aminoplasten, also. beispielsweise schaumförmigen: 1darnstoff-FoirmaIdelivd-Ha.rze:n, bedeckt, die: an Ort und Stelle erzeugt werden.It has now been found that mau agricultural cultivated soils the usual preparation and sowing effective against the deterioration of their structure protect and promote the plant aiwac: hsturn as well as the development of weeds, You can prevent fungus and insects if you cover the floor surface with one layer from porous. Synthetic resins, in particular made of hardening resins. Aminoplasts, so. for example foamy: 1darnea-FoirmaIdelivd-Ha.rze: n, covered, the: in place be generated.
Diese verschäumten, härtbaren Kunstharze werden im allgemeinen mit Härtungsmitteln versetzt. Besonders. geeignete Härtungsmittel sind Verbindungen, die z u s ätzlich a düngende Eigenschaften besitzen, z. B.These foamed, curable synthetic resins are generally used with Hardening agents added. Particularly. suitable hardening agents are compounds, which also have a fertilizing properties, z. B.
Phosphorsäure, pliosphoirsaujre Salze. Ammoniumstilfat und Animonitiinchlorid. Durch Zusatz von Pflanzennährstoffen sowie von Unkraut-, Insekten-und Pilzbekämpfungsmitteln zum härtharen Kunstharzscha.urn kann zusätzlich das Pflanzenwacbsturn begünstigt und die Entwicklung von Unkraut, Insekten und Pilzen verhindert werden. Durch Zusatz von dunklen Farbstoffen oder Pigmenten kann dein Kunstharzschauni eine wärnieabsorbierende Wirkung verliehen werden.Phosphoric acid, pliosphoirsaujre salts. Ammonium stilfate and animonitiin chloride. By adding plant nutrients as well as weed, insect and fungicides In addition to the hardened synthetic resin turn, the plant growth turn can also be beneficial and the development of weeds, insects and fungi can be prevented. By addition of dark dyes or pigments, your synthetic resin shower can absorb heat Effect can be given.
Zweckmäßig wird, der härt1>are Kuri.sthar7scliaum in einem transportablen, Gerät, das z. B. auf einem Nagen. angebracht sein. kann, erzeugt. Hierbei befindet sich in einem Behälter die Harzlösung und in einem zweiten die- Lösung des Härtungsmittels für <las Ko@ridensa:tionsproelukt. Die Harzlösung oder auch die flärterlösung kann ein. Scha:uiminitte-1 enthalten. Beide Lösungen werden in einer 1-Iisc:hkaniiner vereinigt und in dieser verschäumt. Das Verschäumen kann durch kräftiges mechanisches Bewegen erfolgen, uolxi Luft in. die Mischkaniner eingesaugt wird. Ferner können die Lösungen mit Hilfe eines unter Druck stehenden indifferenten Gases in einen Schaum übergeführt werden. Geeignete Schaummittel sind alle oberflächenaktiven Stoffe. z.13. alkylarvisulfonsaure Salze, wie Alkvlnaphtha.litisulfonate sowie Oxäthylierungsprodukte. Gleichzeitig können Schutzkolloide, wie polvacrvlsaure Salze oder Casein, mitvertvendet werden. Die Härtungszeit wird in bekannter Weise durch die Menge des zugegebenen Hä,rtungsmittels eingestellt und, den örtlichen Verhältmissen, angepaßt.It is expedient to put the harder Kuri.sthar7scliaum in a transportable, Device that z. B. on a gnaw. to be appropriate. can be generated. Here is located The resin solution is in one container and the hardening agent solution in a second for <las Ko @ ridensa: tion product. The resin solution or the flärter solution can a. Scha: uiminitte-1 included. Both solutions are in a 1-Iisc: hkaniiner united and foamed in this. The foaming can be done by vigorous mechanical Moving takes place, uolxi air is sucked into the mixed canine. Furthermore can the solutions into a pressurized inert gas Foam are transferred. Suitable foaming agents are all surface-active substances. z.13. alkylarvisulfonic acid salts, such as Alkvlnaphtha.litisulfonate and Oxäthylierungsprodukte. At the same time, protective colloids, such as polyvinylic acid salts or casein, can also be used will. The hardening time is determined in a known manner by the amount of Hardening agent adjusted and adapted to local conditions.
Der in d.er Mischkammer entstehende Schaum wird nun reit Hilfe von Düsen. besonders von Breitschlitzdüsen. auf die Bodenoberfläche aufgebracht, wo er rasch hä i-tex. Die Dicke der Scha.urnharzschicht kann in weiten Grenzen verändert werden. Aus wirtschaftlichen Gründen wird man im allgemeinen eine etwa, 1 bis 10 mni dicke Schaumschicht auftragen. Uni zu verhindern. da13 diese Schicht durch den Wind weggewelit wird, preßt man den Schaum zweckmäßig, z. B. finit Hilfe einer Walze, die geriffelt sein kann oder gegebenenfalls dornunartige Vorsprünge hat. auf die Erdoberfläche auf. Das günstigste Raumgewicht des gehärteten Kunstharzschaumes liegt zwischen etwa 1 und 10 kg/m3, doch kann es auch wesentlich höher liegen.The foam that arises in the mixing chamber is now assisted by Nozzles. especially of slot nozzles. applied to the soil surface where he quickly got hold of i-tex. The thickness of the Scha.urnharzschicht can be changed within wide limits will. For economic reasons, it will generally be about .1 to 10 Apply a mni thick layer of foam. To prevent uni. that this layer through the Wind is weggewelit, you press the foam appropriately, z. B. finitely with the help of a roller, which can be corrugated or optionally has thorn-like projections. on the Surface of the earth. The most favorable density of the hardened synthetic resin foam is between about 1 and 10 kg / m3, but it can also be much higher.
E s ist zwar bereits bekannt, Holzcelliilo,seb@ahneii 2tif dein Feld. zu erzeugen und' mit diesen Bahnen landwirtscliaftliehe Kulturböden. zu. bedecken. Dieses Vurfali.re:n konnte sich. aber in der Praxis nicht durchsetzen Eine hei der Papierfabrikation übliche flüssig gemachte Holzcellulose- enthält mehr als 9'S % Wasser. Dieser Vorschlag scheitert somit schon an. der Tra.usportfrage. Außerdem stört ein Belag aus Holzoellulosebahnen bei der verhältnismäßig bald nach dein Aufgehen der Saat erforderlichen Bearbeitung des Bodens. Diese bekannten Bannen zerfallen nicht von selbst, sondern bilden eine zusammenhängende Haut, die somit Luft- und. feachtigkeitsundurchlässig ist.It is already known, Holzcelliilo, seb @ ahneii 2tif your field. to produce and 'with these webs agricultural cultivated soils. to. cover. This Vurfali.re:n could. but in practice it does not enforce a hotter Paper making common liquefied wood cellulose - contains more than 9'S% Water. This proposal has already failed. the dream of export. In addition, a flooring made of wood-cellulose strips interferes with the relatively soon after your emergence of the seeds required cultivation of the soil. These well-known bans do not disintegrate by themselves, but form a cohesive skin, which thus Air and. is impermissible.
Die vorgeschlagenen Überzugsschichten dagegen zerfallen von selbst, sobald ihre, Aufgabe, den Schutz des Bodens in der Zeit zu übernehmen, in der die Pflanze diesen Schutz noch nicht selbst übernehmen kann, erfüllt ist. Hierbei sind sie noch eine, vorzügliche, langsam wirkende StickstoffqueIde. Da der vorgeschlagene Bodenüberzug je nach der aufgebrachten Menge Schaumharz mehr oder weniger porös hergestellt werden kann,, gestattet er den Durchtritt von Luft und verhindert gleichzeitig die Zerstörung der Bodenoberfläche durch Schlagregen" während das Regenwasser dennoch in den. Boden eintreten kann. Gleichzeitig wird die Wasserverdunstung reguliert.The proposed coating layers, on the other hand, disintegrate by themselves, as soon as their task to take over the protection of the soil in the time in which the The plant cannot yet take over this protection itself, is fulfilled. Here are she is another excellent, slow-acting nitrogen quid. As the proposed Floor covering more or less porous depending on the amount of foam resin applied can be made, it allows the passage of air and prevents at the same time the destruction of the soil surface by driving rain "while the rainwater nevertheless in the. Ground can enter. At the same time, water evaporation is regulated.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB42896A DE1028594B (en) | 1956-12-21 | 1956-12-21 | Process for the treatment of agricultural cultivated soils and for the promotion of plant growth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB42896A DE1028594B (en) | 1956-12-21 | 1956-12-21 | Process for the treatment of agricultural cultivated soils and for the promotion of plant growth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1028594B true DE1028594B (en) | 1958-04-24 |
Family
ID=6966874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB42896A Pending DE1028594B (en) | 1956-12-21 | 1956-12-21 | Process for the treatment of agricultural cultivated soils and for the promotion of plant growth |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1028594B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1137051B (en) | 1958-11-18 | 1962-09-27 | Richard Titze | Process for the independent, short-term conversion of lowland into humus or cultivated soil |
| DE1149195B (en) | 1960-07-29 | 1963-05-22 | Alco Chemical Corp | Use of a latex mixture as an agent for treating agricultural cultivated soils, in particular for preventing soil erosion |
| DE1225437B (en) | 1960-12-15 | 1966-09-22 | Herbert Kurth | Carrier layer for plant cultivation on reclamation, sand or desert soils |
| DE1290007B (en) * | 1960-06-22 | 1969-02-27 | Scholten Chemische Fab | Method for stabilizing soil against erosion |
| DE1299662B (en) * | 1959-02-18 | 1969-07-24 | Dow Chemical Co | Plant growth medium |
| DE3931107A1 (en) * | 1989-09-18 | 1991-03-28 | Hago Chemotechnik Vertriebs Gm | ANTI-GAME BITE AND ANTI-GAME BIT DISPENSER |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE522374C (en) * | 1931-04-07 | Artur Streich | Method and device for promoting plant growth | |
| DE548536C (en) * | 1931-03-08 | 1932-04-20 | Josef Madl | Process for promoting plant growth |
| DE556201C (en) * | 1931-06-30 | 1932-08-04 | Josef Madl | Cover plates to promote plant growth |
| DE839944C (en) * | 1948-10-02 | 1952-05-26 | Hermann Doehler | Soil improvers |
| DE920487C (en) * | 1952-11-25 | 1954-11-22 | Heinrich Unfried | Process for improving soil, especially soil that dries out easily |
-
1956
- 1956-12-21 DE DEB42896A patent/DE1028594B/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE522374C (en) * | 1931-04-07 | Artur Streich | Method and device for promoting plant growth | |
| DE548536C (en) * | 1931-03-08 | 1932-04-20 | Josef Madl | Process for promoting plant growth |
| DE556201C (en) * | 1931-06-30 | 1932-08-04 | Josef Madl | Cover plates to promote plant growth |
| DE839944C (en) * | 1948-10-02 | 1952-05-26 | Hermann Doehler | Soil improvers |
| DE920487C (en) * | 1952-11-25 | 1954-11-22 | Heinrich Unfried | Process for improving soil, especially soil that dries out easily |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1137051B (en) | 1958-11-18 | 1962-09-27 | Richard Titze | Process for the independent, short-term conversion of lowland into humus or cultivated soil |
| DE1299662B (en) * | 1959-02-18 | 1969-07-24 | Dow Chemical Co | Plant growth medium |
| DE1290007B (en) * | 1960-06-22 | 1969-02-27 | Scholten Chemische Fab | Method for stabilizing soil against erosion |
| DE1149195B (en) | 1960-07-29 | 1963-05-22 | Alco Chemical Corp | Use of a latex mixture as an agent for treating agricultural cultivated soils, in particular for preventing soil erosion |
| DE1225437B (en) | 1960-12-15 | 1966-09-22 | Herbert Kurth | Carrier layer for plant cultivation on reclamation, sand or desert soils |
| DE3931107A1 (en) * | 1989-09-18 | 1991-03-28 | Hago Chemotechnik Vertriebs Gm | ANTI-GAME BITE AND ANTI-GAME BIT DISPENSER |
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