CA279374A - Perforatrice a roc - Google Patents

Perforatrice a roc

Info

Publication number
CA279374A
CA279374A CA279374A CA279374DA CA279374A CA 279374 A CA279374 A CA 279374A CA 279374 A CA279374 A CA 279374A CA 279374D A CA279374D A CA 279374DA CA 279374 A CA279374 A CA 279374A
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
CA279374A
Other languages
English (en)
Inventor
James Grant 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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA279374A publication Critical patent/CA279374A/fr
Expired legal-status Critical Current

Links

CA279374A Perforatrice a roc Expired CA279374A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA279374T

Publications (1)

Publication Number Publication Date
CA279374A true CA279374A (fr) 1928-04-17

Family

ID=35212466

Family Applications (1)

Application Number Title Priority Date Filing Date
CA279374A Expired CA279374A (fr) Perforatrice a roc

Country Status (1)

Country Link
CA (1) CA279374A (fr)

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