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公开(公告)号：US1332055A
公开(公告)日：1920-02-24
申请号：US31401119
申请日：1919-07-29
Applicant: WINFRED MINER EVERETT
Inventor： WINFRED MINER EVERETT
IPC: B23B29/14
CPC classification number: B23B29/14 , Y10T407/134 , Y10T407/2246
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