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公开(公告)号：US2616163A
公开(公告)日：1952-11-04
申请号：US1441848
申请日：1948-03-12
Applicant: SMITH CORP A O
Inventor： EWALD SCHMITZ , WEBER RAYMOND C
CPC classification number: B23K31/00 , C23D5/00 , Y10S220/917 , Y10T29/49888
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