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1.发明授权Device for controlling movement of pipe or the like along a roller conveyer 失效用于控制管道或类似物沿着辊式输送机的运动的装置
公开(公告)号：US2597941A
公开(公告)日：1952-05-27
申请号：US7783549
申请日：1949-02-23
Applicant: UNITED STATES STEEL CORP
Inventor： LONG LOUIS W
CPC classification number: B65G47/8846 , B65G47/1492 , B65G2201/0217 , B65G2205/04
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