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公开(公告)号：US1444205A
公开(公告)日：1923-02-06
申请号：US57246022
申请日：1922-07-03
Applicant: CHICAGO MALLEABLE CASTINGS COM
Inventor： OSBORN WARREN M , WADE REGINALD N
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/10 , Y10S411/922
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