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公开(公告)号：US2285324A
公开(公告)日：1942-06-02
申请号：US41868541
申请日：1941-11-12
Applicant: EDGAR BENNETT ALEXANDER
Inventor： EDGAR BENNETT ALEXANDER
IPC: F16K15/18
CPC classification number: F16K15/181 , Y10T74/20504
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