Improvements in and relating to the setting of pit-props,申请号GB19580022361-传众专利搜索

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发明名称	Improvements in and relating to the setting of pit-props
摘要
申请公布号	GB897701(A)	申请公布日期	1962.05.30
申请号	GB19580022361	申请日期	1958.07.11
申请人	RUDOLF BEYER	发明人
分类号	E21D15/58;E21D15/582	主分类号	E21D15/58
代理机构		代理人
主权项
地址

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