Improvements relating to hydraulic pit-props,申请号GB19570001834-传众专利搜索

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发明名称	Improvements relating to hydraulic pit-props
摘要
申请公布号	GB853410(A)	申请公布日期	1960.11.09
申请号	GB19570001834	申请日期	1957.01.17
申请人	GUTEHOFFNUNGSHUETTE STERKRADE AKTIENGESELLSCHAFT	发明人
分类号	E21D15/51	主分类号	E21D15/51
代理机构		代理人
主权项
地址

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