CA271779A - Perforatrice a roc - Google Patents

Perforatrice a roc

Info

Publication number
CA271779A
CA271779A CA271779A CA271779DA CA271779A CA 271779 A CA271779 A CA 271779A CA 271779 A CA271779 A CA 271779A CA 271779D A CA271779D A CA 271779DA CA 271779 A CA271779 A CA 271779A
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
CA271779A
Other languages
English (en)
Inventor
Treve Holman Arthur
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 CA271779A publication Critical patent/CA271779A/fr
Expired legal-status Critical Current

Links

CA271779A Perforatrice a roc Expired CA271779A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA271779T

Publications (1)

Publication Number Publication Date
CA271779A true CA271779A (fr) 1927-06-21

Family

ID=35201810

Family Applications (1)

Application Number Title Priority Date Filing Date
CA271779A Expired CA271779A (fr) Perforatrice a roc

Country Status (1)

Country Link
CA (1) CA271779A (fr)

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