Apparatus for effecting or controlling traverse of a body between opposed walls,申请号US19450600379-传众专利搜索

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发明名称	Apparatus for effecting or controlling traverse of a body between opposed walls
摘要
申请公布号	US2579981(A)	申请公布日期	1951.12.25
申请号	US19450600379	申请日期	1945.06.19
申请人	MARKHAM & COMPANY LIMITED	发明人	SPRAGG HARRY
分类号	E21C29/02	主分类号	E21C29/02
代理机构		代理人
主权项
地址

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