Приспособление для предохранения работающих в забое людей от завала породой,申请号SU19390022722-传众专利搜索

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发明名称	Приспособление для предохранения работающих в забое людей от завала породой
摘要
申请公布号	SU58469(A1)	申请公布日期	1939.11.30
申请号	SU19390022722	申请日期	1939.03.25
申请人	SKORYJ B.M.	发明人	SKORYJ B.M.
分类号	E21D19/02	主分类号	E21D19/02
代理机构		代理人
主权项
地址

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