Advanceable roof support assembly,申请号GB19640001659-传众专利搜索

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发明名称	Advanceable roof support assembly
摘要
申请公布号	GB1032021(A)	申请公布日期	1966.06.08
申请号	GB19640001659	申请日期	1964.01.14
申请人	DOWTY MINING EQUIPMENT LIMITED	发明人	BOLTON DOUGLAS HERBERT HEWLETT;POTTS MICHAEL CHARLES
分类号	E21D23/16;F15B13/042	主分类号	E21D23/16
代理机构		代理人
主权项
地址

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