CA507268A - Methodes et appareils a percer - Google Patents

Methodes et appareils a percer

Info

Publication number
CA507268A
CA507268A CA507268A CA507268DA CA507268A CA 507268 A CA507268 A CA 507268A CA 507268 A CA507268 A CA 507268A CA 507268D A CA507268D A CA 507268DA CA 507268 A CA507268 A CA 507268A
Authority
CA
Canada
Prior art keywords
drilling
methods
boring apparatus
boring
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
CA507268A
Other languages
English (en)
Inventor
F. Wales George
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.)
WALES-STRIPPIT Corp
Original Assignee
WALES-STRIPPIT Corp
Publication date
Application granted granted Critical
Publication of CA507268A publication Critical patent/CA507268A/fr
Expired legal-status Critical Current

Links

CA507268A Methodes et appareils a percer Expired CA507268A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA507268T

Publications (1)

Publication Number Publication Date
CA507268A true CA507268A (fr) 1954-11-09

Family

ID=35653207

Family Applications (1)

Application Number Title Priority Date Filing Date
CA507268A Expired CA507268A (fr) Methodes et appareils a percer

Country Status (1)

Country Link
CA (1) CA507268A (fr)

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