CA548404A - Centralisateur en acier de fleuret pour perforatrice de houille - Google Patents

Centralisateur en acier de fleuret pour perforatrice de houille

Info

Publication number
CA548404A
CA548404A CA548404A CA548404DA CA548404A CA 548404 A CA548404 A CA 548404A CA 548404 A CA548404 A CA 548404A CA 548404D A CA548404D A CA 548404DA CA 548404 A CA548404 A CA 548404A
Authority
CA
Canada
Prior art keywords
drill
coal
steel centralizer
centralizer
drill steel
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
CA548404A
Other languages
English (en)
Inventor
F. Hale Ralph
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.)
Joy Manufacturing Co
Original Assignee
Joy Manufacturing Co
Publication date
Application granted granted Critical
Publication of CA548404A publication Critical patent/CA548404A/fr
Expired legal-status Critical Current

Links

CA548404A Centralisateur en acier de fleuret pour perforatrice de houille Expired CA548404A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA548404T

Publications (1)

Publication Number Publication Date
CA548404A true CA548404A (fr) 1957-11-05

Family

ID=35709777

Family Applications (1)

Application Number Title Priority Date Filing Date
CA548404A Expired CA548404A (fr) Centralisateur en acier de fleuret pour perforatrice de houille

Country Status (1)

Country Link
CA (1) CA548404A (fr)

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