Improvements relating to water couplings for rotary drilling machines as used, for example, in mines, quarries and the like,申请号GB19510028918-传众专利搜索

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发明名称	Improvements relating to water couplings for rotary drilling machines as used, for example, in mines, quarries and the like
摘要
申请公布号	GB718617(A)	申请公布日期	1954.11.17
申请号	GB19510028918	申请日期	1951.12.10
申请人	SIEMENS-SCHUCKERT (GREAT BRITAIN) LIMITED;BENJAMIN JOHN DIXON	发明人
分类号	E21B21/01	主分类号	E21B21/01
代理机构		代理人
主权项
地址

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