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公开(公告)号：US1630771A
公开(公告)日：1927-05-31
申请号：US72663724
申请日：1924-07-17
Applicant: EUGEN THOMA
Inventor： EUGEN THOMA
IPC: B23K1/00
CPC classification number: B23K1/0008 , B23K2201/30
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