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公开(公告)号：US2409180A
公开(公告)日：1946-10-15
申请号：US52739044
申请日：1944-03-21
Applicant: ANNETT
Inventor： ANNETT CHARLES E , MALCOLM ARMSTRONG
IPC: F16B19/10
CPC classification number: F16B19/1036 , Y10T29/49972
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