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公开(公告)号：US2726104A
公开(公告)日：1955-12-06
申请号：US32090252
申请日：1952-11-17
Applicant: OIL CT TOOL COMPANY
Inventor： BOITNOTT BOYD D , ZAWACKI JOHN P
CPC classification number: F16L27/082 , Y10S251/90 , Y10S285/909 , Y10S285/918
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