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公开(公告)号：US3209119A
公开(公告)日：1965-09-28
申请号：US27393663
申请日：1963-04-18
Applicant: SMITH CORP A O
Inventor： KEIDEL RALPH A , SOLOMON KELLER , GEORGE METROPULOS
IPC: B23K9/18
CPC classification number: B23K9/186
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