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AU226971B2 - Tunneling apparatus - Google Patents

Tunneling apparatus

Info

Publication number
AU226971B2
AU226971B2 AU35085/58A AU3508558A AU226971B2 AU 226971 B2 AU226971 B2 AU 226971B2 AU 35085/58 A AU35085/58 A AU 35085/58A AU 3508558 A AU3508558 A AU 3508558A AU 226971 B2 AU226971 B2 AU 226971B2
Authority
AU
Australia
Prior art keywords
tunneling apparatus
tunneling
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.)
Expired
Application number
AU35085/58A
Other versions
AU3508558A (en
Inventor
Charles Hassert and Thomas Nelson Williamson John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hughes Tool Co
Original Assignee
Hughes Tool Co
Filing date
Publication date
Application filed by Hughes Tool Co filed Critical Hughes Tool Co
Application granted granted Critical
Publication of AU226971B2 publication Critical patent/AU226971B2/en
Publication of AU3508558A publication Critical patent/AU3508558A/en
Expired legal-status Critical Current

Links

AU35085/58A 1958-02-06 Tunneling apparatus Expired AU226971B2 (en)

Publications (2)

Publication Number Publication Date
AU226971B2 true AU226971B2 (en) 1958-08-07
AU3508558A AU3508558A (en) 1958-08-07

Family

ID=

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