CUTTING STRUCTURES FOR ROTARY DRILL BITS,申请号GB19840031633-传众专利搜索

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发明名称	CUTTING STRUCTURES FOR ROTARY DRILL BITS
摘要
申请公布号	GB8431633(D0)	申请公布日期	1985.01.30
申请号	GB19840031633	申请日期	1984.12.14
申请人	NL PETROLEUM PRODUCTS LTD	发明人
分类号	B23K31/02;B24D3/00;C04B37/00	主分类号	B23K31/02
代理机构		代理人
主权项
地址

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