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公开(公告)号:CA715919A
公开(公告)日:1965-08-17
申请号:CA715919D
Applicant: HUGHES TOOL CO
Inventor: GALLE EDWARD M , ATKINSON GERALD O , MEDLOCK JAMES D
公开(公告)号:CA715919A
公开(公告)日:1965-08-17
申请号:CA715919D
Applicant: HUGHES TOOL CO
Inventor: GALLE EDWARD M , ATKINSON GERALD O , MEDLOCK JAMES D