CA567952A - Formation de trous d'event - Google Patents

Formation de trous d'event

Info

Publication number
CA567952A
CA567952A CA567952A CA567952DA CA567952A CA 567952 A CA567952 A CA 567952A CA 567952 A CA567952 A CA 567952A CA 567952D A CA567952D A CA 567952DA CA 567952 A CA567952 A CA 567952A
Authority
CA
Canada
Prior art keywords
riser openings
forming riser
forming
openings
riser
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
CA567952A
Other languages
English (en)
Inventor
Q. Sylvester Edmund
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.)
Griffin Wheel Co Inc
Original Assignee
Griffin Wheel Co Inc
Publication date
Application granted granted Critical
Publication of CA567952A publication Critical patent/CA567952A/fr
Expired legal-status Critical Current

Links

CA567952A Formation de trous d'event Expired CA567952A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA567952T

Publications (1)

Publication Number Publication Date
CA567952A true CA567952A (fr) 1958-12-23

Family

ID=35740478

Family Applications (1)

Application Number Title Priority Date Filing Date
CA567952A Expired CA567952A (fr) Formation de trous d'event

Country Status (1)

Country Link
CA (1) CA567952A (fr)

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