Replaceable nozzle for drill bits,申请号US19540420994-传众专利搜索

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发明名称	Replaceable nozzle for drill bits
摘要
申请公布号	US2855182(A)	申请公布日期	1958.10.07
申请号	US19540420994	申请日期	1954.04.05
申请人	HUGHES TOOL COMPANY	发明人	PAYNE LYLE L.
分类号	E21B10/18	主分类号	E21B10/18
代理机构		代理人
主权项
地址

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