本文提出了小温升条件下固体热传导系统变温过程拟合的新方法。
In this paper a new method which is applied for fitting temperature ascent process with small temperature range of the solid-heat conduction system is presented.
通过动力电缆给井下直线电机供电后产生交变磁场，永磁体动子在交变磁场作用下带动泵柱塞上下往复运动，从而达到举升抽油的目的。
Under the action of variation magnetic field, the permanent magnet moving-coil drives the plunger pump to move up and down and lift oil up to ground.
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