Roof supporting means for mines,申请号US19610089159-传众专利搜索

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发明名称	Roof supporting means for mines
摘要
申请公布号	US3197966(A)	申请公布日期	1965.08.03
申请号	US19610089159	申请日期	1961.02.14
申请人	GULLICK LIMITED	发明人	ARNOTT LESLIE JOHN
分类号	E21D23/00;E21F13/08	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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