VANGGEREEDSCHAP.,申请号NL19800002099-传众专利搜索

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发明名称	VANGGEREEDSCHAP.
摘要
申请公布号	NL8002099(A)	申请公布日期	1981.03.23
申请号	NL19800002099	申请日期	1980.04.10
申请人	HALLIBURTON COMPANY TE DUNCAN, OKLAHOMA, VER. ST. V. AM.	发明人
分类号	E21B31/16;E21B31/20;(IPC1-7):E21B31/20	主分类号	E21B31/16
代理机构		代理人
主权项
地址

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