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Individual
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Individual
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Priority to ES50764ApriorityCriticalpatent/ES50764A1/en
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A process for preparing a special transparent rotproof material, which offers great resistance, being considered non-flammable and capable of being produced in the form of various objects such as sheets, bands, strips, films.
An industrial result consisting of the application of harmonic machines to produce sounds provided with a disk of rigid material, on whose upper face portraits, vignettes, landscapes, views, groups, legends are stamped or glued in black or in black.