Устройство для крепления выработанного пространства на крутопадающих пластах,申请号SU19400039023-传众专利搜索

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发明名称	Устройство для крепления выработанного пространства на крутопадающих пластах
摘要
申请公布号	SU63703(A1)	申请公布日期	1943.11.30
申请号	SU19400039023	申请日期	1940.12.10
申请人	SHOLOKHOV V.N.	发明人	SHOLOKHOV V.N.
分类号	E21D19/00	主分类号	E21D19/00
代理机构		代理人
主权项
地址

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