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公开(公告)号：US2435480A
公开(公告)日：1948-02-03
申请号：US58295345
申请日：1945-03-15
Applicant: JOHN TUTTLE
Inventor： JOHN TUTTLE
IPC: B23B31/40
CPC classification number: B23B31/4033 , Y10T279/1008 , Y10T279/1045 , Y10T279/3418
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