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发明名称
METHOD AND APPARATUS FOR CENTERING PIPES AT HOLES AXES IN TRIPPING PROCESS
摘要
申请公布号
SU1078022(A1)
申请公布日期
1984.03.07
申请号
SU19813351069
申请日期
1981.10.20
申请人
NI KT I TYAZHELOGO MASH PROIZVODSTVENNOGO OBEDINENIYA "URALMASH"
发明人
GRAMOLIN VADIM N,SU;MIKHAJLOV LEV N,SU;SKOROBOGATOV VLADIMIR A,SU
分类号
E21B19/24;E21B19/00;(IPC1-7):E21B19/00
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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