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公开(公告)号：US3398653A
公开(公告)日：1968-08-27
申请号：US57477566
申请日：1966-08-24
Applicant: JOHN D. FOSTER
Inventor： FOSTER JOHN D
CPC classification number: F16J1/02 , F02B75/22 , F02F3/00 , F05C2201/0448
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