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公开(公告)号：US2391550A
公开(公告)日：1945-12-25
申请号：US51039143
申请日：1943-11-15
Applicant: COMPTON COPE WILFRID
Inventor： COMPTON COPE WILFRID
IPC: B23B31/20
CPC classification number: B23B31/201 , Y10T279/17521
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