Improvements in rock drilling mechanisms,申请号GB19540029243-传众专利搜索

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发明名称	Improvements in rock drilling mechanisms
摘要
申请公布号	GB767814(A)	申请公布日期	1957.02.06
申请号	GB19540029243	申请日期	1954.10.11
申请人	ATLAS COPIO AKTIEBOLAG	发明人
分类号	E21B19/087	主分类号	E21B19/087
代理机构		代理人
主权项
地址

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