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发明名称
DEVICE FOR REMOVING SLIME IN DRILLING WELL
摘要
申请公布号
SU949171(A1)
申请公布日期
1982.08.07
申请号
SU19803213952
申请日期
1980.12.12
申请人
VNI PK I GORNORUDNOGO MASHINOSTROENIYA
发明人
SHCHERBINA VLADIMIR N,SU;KURUNOV ALEKSANDR G,SU;ZAVARZIN MIKHAIL I,SU;SKVORCHEVSKAYA VERONIKA A,SU
分类号
E21B21/015;(IPC1-7):E21C7/00
主分类号
E21B21/015
代理机构
代理人
主权项
地址
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