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发明名称
Самоосвобождающийся элеватор
摘要
申请公布号
SU142601(A1)
申请公布日期
1961.11.30
申请号
SU19610727638
申请日期
1961.04.20
申请人
发明人
SHILOV G.P.
分类号
E21B19/07
主分类号
E21B19/07
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代理人
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