METHOD FOR MINING COARSE, STEEPLY SLANTED OR STEEPLY DEPOSITED COALS, ESPECIALLY LOOSE AND SUSTEPTIBLE TO AUTOIGNITION,申请号PL19860259580-传众专利搜索

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发明名称	METHOD FOR MINING COARSE, STEEPLY SLANTED OR STEEPLY DEPOSITED COALS, ESPECIALLY LOOSE AND SUSTEPTIBLE TO AUTOIGNITION
摘要
申请公布号	PL150825(B1)	申请公布日期	1990.07.31
申请号	PL19860259580	申请日期	1986.05.16
申请人		发明人
分类号	E21C41/18;(IPC1-7):E21C41/18	主分类号	E21C41/18
代理机构		代理人
主权项
地址

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