APPARATUS FOR MEASURING THE THICKNESS OF PROTECTIVE COAL LAYER ATOP OF POWER-OPERATED STOPING ROOF SUPPORT,申请号SU19742067684-传众专利搜索

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发明名称	APPARATUS FOR MEASURING THE THICKNESS OF PROTECTIVE COAL LAYER ATOP OF POWER-OPERATED STOPING ROOF SUPPORT
摘要
申请公布号	SU567819(A1)	申请公布日期	1977.08.05
申请号	SU19742067684	申请日期	1974.10.11
申请人	TULSKIJ POLT INSTITUT	发明人	KALININ MIKHAIL M,SU
分类号	E21D23/04;(IPC1-7):E21D23/04	主分类号	E21D23/04
代理机构		代理人
主权项
地址

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