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AU443769B2 - Earth drilling machine - Google Patents
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AU443769B2 - Earth drilling machine - Google Patents

Earth drilling machine

Info

Publication number
AU443769B2
AU443769B2 AU23965/71A AU2396571A AU443769B2 AU 443769 B2 AU443769 B2 AU 443769B2 AU 23965/71 A AU23965/71 A AU 23965/71A AU 2396571 A AU2396571 A AU 2396571A AU 443769 B2 AU443769 B2 AU 443769B2
Authority
AU
Australia
Prior art keywords
drilling machine
earth drilling
earth
machine
drilling
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
AU23965/71A
Other versions
AU2396571A (en
Inventor
B. Porter Wilson
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.)
Robbins Co
Original Assignee
Robbins Co
Filing date
Publication date
Application filed by Robbins Co filed Critical Robbins Co
Application granted granted Critical
Publication of AU443769B2 publication Critical patent/AU443769B2/en
Publication of AU2396571A publication Critical patent/AU2396571A/en
Expired legal-status Critical Current

Links

AU23965/71A 1971-01-04 Earth drilling machine Expired AU443769B2 (en)

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU66531/74A Division AU463415B2 (en) 1974-03-11 1974-03-11 Earth drilling machine

Publications (2)

Publication Number Publication Date
AU443769B2 true AU443769B2 (en) 1972-07-06
AU2396571A AU2396571A (en) 1972-07-06

Family

ID=

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