Yieldable underground supporting frames for mines,申请号GB19520026562-传众专利搜索

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发明名称	Yieldable underground supporting frames for mines
摘要
申请公布号	GB721647(A)	申请公布日期	1955.01.12
申请号	GB19520026562	申请日期	1952.10.22
申请人	ARTUR LUKA	发明人
分类号	E21D11/18	主分类号	E21D11/18
代理机构		代理人
主权项
地址

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