METHOD OF DRILLING MUD LOCAL CIRCULATING,申请号SU19701450765-传众专利搜索

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发明名称	METHOD OF DRILLING MUD LOCAL CIRCULATING
摘要
申请公布号	SU626191(A1)	申请公布日期	1978.09.30
申请号	SU19701450765	申请日期	1970.06.19
申请人	VNII BUROVOJ TEKHNIKI	发明人	YASASHIN ANATOLIJ M,SU;BRYUSHKOV NIKOLAJ ,SU;BLINOV VIKTOR ,SU
分类号	E21B21/00;(IPC1-7):E21B21/00	主分类号	E21B21/00
代理机构		代理人
主权项
地址

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