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发明名称
Индикатор работы летающего скребка в нефтяных скважинах
摘要
申请公布号
SU111470(A1)
申请公布日期
1957.11.30
申请号
SU19570568251
申请日期
1957.01.18
申请人
KAPUSTIN A.G.
发明人
KAPUSTIN A.G.
分类号
E21B37/02;E21B47/12
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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