Improvements in or relating to mine roofs supports,申请号GB19570002555-传众专利搜索

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发明名称	Improvements in or relating to mine roofs supports
摘要
申请公布号	GB827997(A)	申请公布日期	1960.02.10
申请号	GB19570002555	申请日期	1957.01.24
申请人	BERGBAU-AKTIENGESELLSCHAFT CONSTANTIN DER GROSSE	发明人
分类号	E21D21/00	主分类号	E21D21/00
代理机构		代理人
主权项
地址

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