... 打捞公锥导向器 screw grab guide 打捞套管公锥 casing tap 打捞钻头的公锥 bit recovering tap ...
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casing fishing tap 套管打捞公锥
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The paper analyses the current transformer (ct) that secondary winding possesses casing tap, and its secondary connector wiring fault's influence on the ct changing rate.
文章分析了二次绕组带有抽头的套管电流互感器(CT),其二次端子接线错误对CT变比的影响。
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