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公开(公告)号：US2996958A
公开(公告)日：1961-08-22
申请号：US59260856
申请日：1956-06-20
Applicant: PFAUTER FA HERMANN
Inventor： HANS-PETER MENTE
CPC classification number: B23F23/1243 , B23F5/22 , Y10T409/102067 , Y10T409/10318 , Y10T409/103657
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