ROTARY DRILL BITS,申请号GB19850021924-传众专利搜索

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发明名称	ROTARY DRILL BITS
摘要
申请公布号	GB8521924(D0)	申请公布日期	1985.10.09
申请号	GB19850021924	申请日期	1985.09.04
申请人	NL PETROLEUM PRODUCTS LTD	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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