00263nam a2200097Ia 4500008004100000041000800041082002000049100001600069245007200085300000800157211209s9999    xx            000 0 und d  aeng  a621.317 N73 RAM  aRAMSHAW R S  aPOWER ELECTRONICS : THYRISTOR CONTROLED POWER FOR ELECTRIC MOTORS.   a274