粮面平整器
grain surface leveling machine
水田碎土整平器
implement for pulverizing
单相三电平整流器
single-phase three-level converter
电平调整衰减器
level adjusting attenuator
二极管箝位三电平PWM整流器
diode clamped three-level PWM rectifier
连续调整标准电平输送振荡器
continuously adjustable normal level sending oscillator