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公开(公告)号：US1620923A
公开(公告)日：1927-03-15
申请号：US7940926
申请日：1926-01-05
Applicant: SHAVER LESTER W
Inventor： SHAVER LESTER W
IPC: B25D1/02
CPC classification number: B25D1/02 , B25D2250/085 , B25D2250/105
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