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经营范围
发明名称
DRILL STRING FLOAT VALVE
摘要
申请公布号
RU1788199(C)
申请公布日期
1993.01.15
申请号
SU19894740798
申请日期
1989.06.27
申请人
POPOV IVAN,SU;SPIVAKOVSKIJ YURIJ,SU;PLODUKHIN YURIJ P,SU;SHABASHEV EVGENIJ F,SU
发明人
POPOV IVAN I,SU;SPIVAKOVSKIJ YURIJ I,SU;PLODUKHIN YURIJ P,SU;SHABASHEV EVGENIJ F,SU
分类号
E21B21/10;E21B34/06
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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