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公开(公告)号：US1749558A
公开(公告)日：1930-03-04
申请号：US38859129
申请日：1929-08-26
Applicant: EMPIRE RAILWAY SUPPLY CORP
Inventor： BARILI ARTHUR E H , HYLE JACOB A
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/08
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