Improvements in or relating to advancing hydraulic mine roof supports,申请号GB19640004766-传众专利搜索

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发明名称	Improvements in or relating to advancing hydraulic mine roof supports
摘要
申请公布号	GB1072453(A)	申请公布日期	1967.06.14
申请号	GB19640004766	申请日期	1964.02.04
申请人	GULLICK LIMITED	发明人	ALLEN ARCHELAIUS DAWSON;HISLEY GERARD
分类号	E21D23/00	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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