Improved mine roof supports,申请号GB19600033944-传众专利搜索

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发明名称	Improved mine roof supports
摘要
申请公布号	GB999671(A)	申请公布日期	1965.07.28
申请号	GB19600033944	申请日期	1960.10.04
申请人	N. J. MUSCHAMP & COMPANY LIMITED	发明人	KENT CECIL
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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