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公开(公告)号：US1227564A
公开(公告)日：1917-05-29
申请号：US8172616
申请日：1916-03-02
Applicant: NYA AKTIEBOLAGET ATLAS
Inventor： ANDERSSON GUSTAF
CPC classification number: B23Q1/0036 , B23B31/201 , Y10T279/17111
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