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公开(公告)号：US3047343A
公开(公告)日：1962-07-31
申请号：US734060
申请日：1960-02-08
Applicant: MENASCO MFG COMPANY
Inventor： STEWART ALFORD K , KEECH ROGER A
IPC: F16B21/18
CPC classification number: F16B21/186
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