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公开(公告)号：US3111431A
公开(公告)日：1963-11-19
申请号：US72337858
申请日：1958-03-24
Applicant: B L WEAVER JR
Inventor： WEAVER JACK W
CPC classification number: F16L58/02 , B05C7/08 , F16L58/1009 , Y10S118/10
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