Track positioned car-feeding mechanism

作者: Muntz Clarence L , Merritt Glenn W

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参考文章(7)
Arthur R Wilson, Railroad car handling device ,(1931)
George H. Robinson, Pusher dog conveyer assembly ,(1950)
Samuel B Brittain, Drag-out mechanism for furnaces ,(1943)
William C Richey, Railway-car-handling mechanism ,(1923)
George M Johnson, Car handling apparatus ,(1931)