Щит для проходки вертикальных шахт снизу вверх,申请号SU19400343060-传众专利搜索

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发明名称	Щит для проходки вертикальных шахт снизу вверх
摘要
申请公布号	SU66758(A1)	申请公布日期	1945.11.30
申请号	SU19400343060	申请日期	1940.11.06
申请人	KRAVCHENKO A.I.	发明人	KRAVCHENKO A.I.
分类号	E21D3/00	主分类号	E21D3/00
代理机构		代理人
主权项
地址

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