Improvements in or relating to pit props,申请号GB19490026353-传众专利搜索

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发明名称	Improvements in or relating to pit props
摘要
申请公布号	GB690223(A)	申请公布日期	1953.04.15
申请号	GB19490026353	申请日期	1949.10.13
申请人	EISENWERK WANHEIM G.M.B.H.	发明人
分类号	E21D15/38	主分类号	E21D15/38
代理机构		代理人
主权项
地址

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