SELF-ADVANCING MINE ROOF SUPPORTS,申请号GB19740010433-传众专利搜索

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发明名称	SELF-ADVANCING MINE ROOF SUPPORTS
摘要
申请公布号	GB1491466(A)	申请公布日期	1977.11.09
申请号	GB19740010433	申请日期	1975.01.21
申请人	GULLICK DOBSON LTD	发明人
分类号	E21D23/00;E21D23/08;(IPC1-7):E21D23/00	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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