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公开(公告)号：US2818285A
公开(公告)日：1957-12-31
申请号：US43076354
申请日：1954-05-19
Applicant: SEALOL CORP
Inventor： GREINER HAROLD F
IPC: F16J15/38
CPC classification number: F16J15/38 , Y10S285/90 , Y10S285/91 , Y10S285/918
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