常見例句雙語例句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.通過動力電纜給井下直線電機(jī)供電后產(chǎn)生交變磁場，永磁體動子在交變磁場作用下帶動泵柱塞上下往復(fù)運(yùn)動，從而達(dá)到舉升抽油的目的。syxb-cps.com.cn 返回 plunger magnet