反向电流自动断开开关
automatic reverse current cutout
灭磁开关开断弧压
arc voltage for opening of field breaker
切断开关-断路器
isolated flyback regulator
车辆速度传感器诊断
vehicle speed sensor diagnostics
机器诊断光束线
Machine diagnostic beamline
急诊诊断与治疗
Emergency diagnosis and treatment