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1.发明授权Device for controlling hatch-covers and like panels on ships, railway-cars and the like with the assistance of an endless, driven chain 失效用于在无休止的驱动链条的协助下控制船舶，铁路车辆等上的舱口盖和类似面板的装置
公开(公告)号：US2869859A
公开(公告)日：1959-01-20
申请号：US67369657
申请日：1957-07-23
Applicant: INTERNAT MACGREGOR ORGANIZATIO
Inventor： GUNTER SCHMIDT
IPC: B63B19/18
CPC classification number: B63B19/18
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