METHOD OF CHECKING COAL DUST EXPLOSIONS IN UNDERGROUND MINING EXCAVATIONS,申请号PL19760187649-传众专利搜索

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发明名称	METHOD OF CHECKING COAL DUST EXPLOSIONS IN UNDERGROUND MINING EXCAVATIONS
摘要
申请公布号	PL101610(B1)	申请公布日期	1979.01.31
申请号	PL19760187649	申请日期	1976.03.01
申请人		发明人
分类号	E21F5/00;(IPC1-7):E21F5/00	主分类号	E21F5/00
代理机构		代理人
主权项
地址

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