Power amplifier is used in many fields, such as sound amplifier and electricvibration generator.
功率放大器在很多领域都得到了应用，比如音响、电动振动试验台等等。
2
The device comprises the electricvibration table, a dynamic stress measuring system and a vibration controller.
该装置包括电动振动台，动应力测量系统及振动控制仪。
3
The meaning to identify the vibration of electric machine, the relationship between the vibration and the failure diagnose, the monitoring principle and monitoring means of vibration are discussed.