变: become different; change极: I the utmost point; extreme器: implement; utensil; ware电池变极器: b / i battery inverter电池反相器,电池变极器: b / i battery inverter变极: change poles倒极器: transition electrode unit分极器: polarity splitter换极器: changer pole; pol-change; pole changer; pole reverser; polechanger去极器: depolariser; depolarzer同极器: homopolar转极器: pole changer变极蒂: pole changing control臂板转极器: pole changer operated by semaphore单极器件: unipolar device脉冲分极器: pulsator classifier双极器件: bipolar device转极器,换向器: pole changement变极电动机: change pole motor; change-pole moter; change-pole motor; pole changing motor变极调速: pole changing control; pole-changing control; speed control b pole changing; speed control by pole changing; speed governing by pole changing; speed regulation by pole changing变极发电机: pole-change generator变极开关: polarization switch; pole changing switch交变极性: alternate polarity; alternating polarity可变极限: variable limit潜变极限: creelimit