CA301891A - Acier tubulaire de perforatrice - Google Patents

Acier tubulaire de perforatrice

Info

Publication number
CA301891A
CA301891A CA301891A CA301891DA CA301891A CA 301891 A CA301891 A CA 301891A CA 301891 A CA301891 A CA 301891A CA 301891D A CA301891D A CA 301891DA CA 301891 A CA301891 A CA 301891A
Authority
CA
Canada
Prior art keywords
drill steel
hollow drill
hollow
steel
drill
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
CA301891A
Other languages
English (en)
Inventor
Arvid Engelbrekt Gumaelius Olof
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.)
Fagersta Bruks AB
Original Assignee
Fagersta Bruks AB
Publication date
Application granted granted Critical
Publication of CA301891A publication Critical patent/CA301891A/fr
Expired legal-status Critical Current

Links

CA301891A Acier tubulaire de perforatrice Expired CA301891A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA301891T

Publications (1)

Publication Number Publication Date
CA301891A true CA301891A (fr) 1930-07-08

Family

ID=35255037

Family Applications (1)

Application Number Title Priority Date Filing Date
CA301891A Expired CA301891A (fr) Acier tubulaire de perforatrice

Country Status (1)

Country Link
CA (1) CA301891A (fr)

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