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经营范围
发明名称
WELLHEAD SEALING
摘要
申请公布号
SU1731936(A1)
申请公布日期
1992.05.07
申请号
SU19894726006
申请日期
1989.06.12
申请人
LE GORNYJ I IM.G.V.PLEKHANOVA
发明人
MURAEV YURIJ D,SU;KLIMOV VLADIMIR YA,SU;EGOREVA MARIYA V,SU
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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