薄膜热电器件
thin film thermoelectric device
超声-中频电治疗
Ultrasound-medium frequency electrotherapy
大代耳热电电流计
Duddell’s thermo-galvanometer
thermo-galvanometer
Duddell’s
灯泡电热器
electric luminous radiator
低频电治疗
low frequency electrotherapy
低频脉冲电治疗
Treatment of low-frequency pulse
低温热电器
low temperature thermoelectric unit
低压电器电触头
low voltage apparatus electrical contacts
电疗器
electro medical apparatus