CA323937A - Perforatrice a roc - Google Patents

Perforatrice a roc

Info

Publication number
CA323937A
CA323937A CA323937A CA323937DA CA323937A CA 323937 A CA323937 A CA 323937A CA 323937 A CA323937 A CA 323937A CA 323937D A CA323937D A CA 323937DA CA 323937 A CA323937 A CA 323937A
Authority
CA
Canada
Prior art keywords
drill
rock
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
CA323937A
Other languages
English (en)
Inventor
Leonard Holman John
Mynors Holman Percy
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.)
Holman Brothers Ltd
Original Assignee
Holman Brothers Ltd
Publication date
Application granted granted Critical
Publication of CA323937A publication Critical patent/CA323937A/fr
Expired legal-status Critical Current

Links

CA323937A Perforatrice a roc Expired CA323937A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA323937T

Publications (1)

Publication Number Publication Date
CA323937A true CA323937A (fr) 1932-07-05

Family

ID=35284490

Family Applications (1)

Application Number Title Priority Date Filing Date
CA323937A Expired CA323937A (fr) Perforatrice a roc

Country Status (1)

Country Link
CA (1) CA323937A (fr)

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