A connecting device for mine roof support bars,申请号GB19590031294-传众专利搜索

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发明名称	A connecting device for mine roof support bars
摘要
申请公布号	GB930995(A)	申请公布日期	1963.07.10
申请号	GB19590031294	申请日期	1959.09.14
申请人	RHEINSTAHL WANHEIM G.M.B.H.	发明人
分类号	E21D11/36;E21D17/086	主分类号	E21D11/36
代理机构		代理人
主权项
地址

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