CA300236A - Perforatrice a roc - Google Patents

Perforatrice a roc

Info

Publication number
CA300236A
CA300236A CA300236A CA300236DA CA300236A CA 300236 A CA300236 A CA 300236A CA 300236 A CA300236 A CA 300236A CA 300236D A CA300236D A CA 300236DA CA 300236 A CA300236 A CA 300236A
Authority
CA
Canada
Prior art keywords
rock drill
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
CA300236A
Other languages
English (en)
Inventor
Leonard Holman John
Treve Holman Arthur
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 CA300236A publication Critical patent/CA300236A/fr
Expired legal-status Critical Current

Links

CA300236A Perforatrice a roc Expired CA300236A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA300236T

Publications (1)

Publication Number Publication Date
CA300236A true CA300236A (fr) 1930-05-13

Family

ID=35237555

Family Applications (1)

Application Number Title Priority Date Filing Date
CA300236A Expired CA300236A (fr) Perforatrice a roc

Country Status (1)

Country Link
CA (1) CA300236A (fr)

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