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发明名称
DEVICE FOR SEALING HOLE MOUTH
摘要
申请公布号
SU1633088(A1)
申请公布日期
1991.03.07
申请号
SU19884618108
申请日期
1988.10.31
申请人
LE GORNYJ I IM.G.V.PLEKHANOVA
发明人
KULIN IGOR V,SU;KHOLODOK ALEKSEJ N,SU;KOVALENKO VITALIJ I,SU;KLIMOV VLADIMIR YA,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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