APPARATUS PROTECTING MINING MACHINE IN INCLINED HEADINGS,申请号PL19810230683-传众专利搜索

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发明名称	APPARATUS PROTECTING MINING MACHINE IN INCLINED HEADINGS
摘要
申请公布号	PL131112(B1)	申请公布日期	1984.10.31
申请号	PL19810230683	申请日期	1981.04.15
申请人		发明人
分类号	E21C;E21C29/20;E21C35/04;(IPC1-7):E21C35/04	主分类号	E21C
代理机构		代理人
主权项
地址

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