Improvements in or relating to pit props,申请号GB19500029504-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	GB699913(A)	申请公布日期	1953.11.18
申请号	GB19500029504	申请日期	1950.12.01
申请人	HANS GERLACH	发明人
分类号	E21D15/28;E21D15/582	主分类号	E21D15/28
代理机构		代理人
主权项
地址

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