ROOF SUPPORT FOR A MINE WALL-GALLERY CROSSING POINT,申请号PL19800223455-传众专利搜索

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发明名称	ROOF SUPPORT FOR A MINE WALL-GALLERY CROSSING POINT
摘要
申请公布号	PL125101(B1)	申请公布日期	1983.03.31
申请号	PL19800223455	申请日期	1980.04.14
申请人		发明人
分类号	E21D23/00;E21F13/06;(IPC1-7):E21D11/36	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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