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公开(公告)号：US2585747A
公开(公告)日：1952-02-12
申请号：US8700749
申请日：1949-04-12
Applicant: FILIP BRANDHANDLER
Inventor： BERTHOLD DENZLER
IPC: B23B31/20
CPC classification number: B23B31/201 , Y10T279/17529
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