Improvements in Fluid Valve Means for Mine Roof Supports,申请号GB19650039088-传众专利搜索

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发明名称	Improvements in Fluid Valve Means for Mine Roof Supports
摘要
申请公布号	GB1169361(A)	申请公布日期	1969.11.05
申请号	GB19650039088	申请日期	1965.09.14
申请人	W. E. & F. DOBSON LIMITED	发明人	FRANK TOWN
分类号	E21D23/26;F15B13/02	主分类号	E21D23/26
代理机构		代理人
主权项
地址

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