Способ закрепления плывунов при проходке шахтных стволов,申请号SU19510445200-传众专利搜索

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发明名称	Способ закрепления плывунов при проходке шахтных стволов
摘要
申请公布号	SU94889(A1)	申请公布日期	1952.11.30
申请号	SU19510445200	申请日期	1951.09.18
申请人	SLOBODKIN D.S.	发明人	SLOBODKIN D.S.
分类号	E21D1/16	主分类号	E21D1/16
代理机构		代理人
主权项
地址

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