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公开(公告)号：US2363411A
公开(公告)日：1944-11-21
申请号：US50130143
申请日：1943-09-04
Applicant: GOODWIN RAY W
Inventor： GOODWIN RAY W
IPC: B23B31/20
CPC classification number: B23B31/201 , Y10T279/17529
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