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公开(公告)号：US1176703A
公开(公告)日：1916-03-21
申请号：US1914815959
申请日：1914-02-02
Applicant: DURHAM PAUL E
Inventor： DURHAM PAUL E
CPC classification number: F16K17/06 , Y10T137/3662 , Y10T137/7878
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