Improvements in percussive rock drills,申请号GB19350025282-传众专利搜索

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法人/股东/高管

发明名称	Improvements in percussive rock drills
摘要
申请公布号	GB448821(A)	申请公布日期	1936.06.16
申请号	GB19350025282	申请日期	1935.09.11
申请人	N.V. WALLRAMIT HANDEL MAATSCHAPPIJ	发明人
分类号	E21B10/58	主分类号	E21B10/58
代理机构		代理人
主权项
地址

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