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发明名称
ARRANGEMENT FOR RELIEVING THE WEIGHT OF PIPE STRING
摘要
申请公布号
SU1520234(A1)
申请公布日期
1989.11.07
申请号
SU19874284851
申请日期
1987.07.15
申请人
UK NII PRIRODNYKH GAZOV
发明人
SHLAKHTER ILYA S,SU;FILEV VIKTOR N,SU
分类号
E21B23/00
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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