Yielding Mine Roof Stilts,申请号GB19790031328-传众专利搜索

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发明名称	Yielding Mine Roof Stilts
摘要
申请公布号	GB2030614(A)	申请公布日期	1980.04.10
申请号	GB19790031328	申请日期	1979.09.10
申请人	HAYDEN NILOS CONFLOW LTD	发明人
分类号	E21D15/22;(IPC1-7):E21D11/22	主分类号	E21D15/22
代理机构		代理人
主权项
地址

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