IMPROVEMENTS IN OR RELATING TO A SELF-ADVANCING MINE ROOF SUPPORT,申请号GB19680042891-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO A SELF-ADVANCING MINE ROOF SUPPORT
摘要
申请公布号	GB1287565(A)	申请公布日期	1972.08.31
申请号	GB19680042891	申请日期	1968.09.10
申请人	MASTABAR MINING EQUIPMENT COMPANY LIMITED	发明人	PETER SHUTTLEWORTH
分类号	E21D23/20	主分类号	E21D23/20
代理机构		代理人
主权项
地址

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