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发明名称
DEVICE FOR CEMENTING BOREHOLES
摘要
申请公布号
SU796392(A1)
申请公布日期
1981.01.15
申请号
SU19782694659
申请日期
1978.12.11
申请人
KURTOV VENIAMIN D,SU
发明人
KURTOV VENIAMIN D,SU
分类号
E21B33/14;(IPC1-7):E21B33/14
主分类号
E21B33/14
代理机构
代理人
主权项
地址
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