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发明名称
CORE-LIFTING DEVICE
摘要
申请公布号
SU723098(A1)
申请公布日期
1980.03.25
申请号
SU19711715617
申请日期
1971.11.19
申请人
V P IZYSKATELSKIJ NII "GIDROPROEKT" IM. S.YA.ZHUKA
发明人
OKUNEV MIKHAIL SH,SU;SHEJNBLYUM VLADIMIR M,SU
分类号
E21B25/00;(IPC1-7):E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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