variable pole变磁极性variableadj.可变的；易变的n.变量；易变的东西variable-length packets switch变长分组交换variable blank-holder pressure变压边力Variable Valve Timing technology可变气门正时技术Variable transmit diversity gain可变发射分集增益variable-freqency drilling rig变频钻机variable camber inlet guide vane可变弯度的进口导向叶片variable division ratio deviator可变比分频器variable-primary-flow system一次泵变流量系统variable inductance type circuit可变电感式电路variable impedance transformator可变阻抗变换器