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发明名称
WELL EXPANDER
摘要
申请公布号
SU1463900(A1)
申请公布日期
1989.03.07
申请号
SU19874291079
申请日期
1987.07.29
申请人
TASHTAGOLSKOE RUDOUPRAVLENIE N-PROIZV OBEDINENIYA "SIBRUDA"
发明人
VLASOV VLADIMIR N,SU;MUKHIN ZHORES G,SU;LYALKO VIKTOR V,SU;KOZHEVNIKOV EVGENIJ M,SU;VOLCHENKO GRIGORIJ N,SU;MARKOV PETR N,SU
分类号
E21B7/28;E21D1/06
主分类号
E21B7/28
代理机构
代理人
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地址
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