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摘要
申请公布号
SU95154(A1)
申请公布日期
1952.11.30
申请号
SU19510445371
申请日期
1951.04.03
申请人
ALEKSANDROV M.M.
发明人
ALEKSANDROV M.M.
分类号
E21B19/02
主分类号
E21B19/02
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代理人
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