Pneumatic ground piercing tool with movable chisel head,申请号GB20010001797-传众专利搜索

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发明名称	Pneumatic ground piercing tool with movable chisel head
摘要
申请公布号	GB0101797(D0)	申请公布日期	2001.03.07
申请号	GB20010001797	申请日期	2001.01.24
申请人	EARTH TOOL COMPANY LLC	发明人
分类号	E21B4/14;E21B7/26;E21B10/40	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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