上海４０２超声雾化器采用新兴的药物汽雾疗法，整机结构简单、性能稳定、便于携带易于操作。因此被广泛应用于医院家庭。但由于它长期工作在潮湿的环境中，工作时常与水及汽雾接触，易使某些部件生锈，难于拆卸，给维修带来一定的麻烦。有时强行拆卸，会引起某一部件或总成损? Shanghai 402 ultrasonic nebulizer adopts emerging drug vapor mist therapy. The whole machine has a simple structure, stable performance, easy to carry and easy to operate. Therefore it is widely used in hospital families. However, because it works in a humid environment for a long time, it often comes into contact with water and vapor mist, which makes it easy to rust certain parts and is difficult to disassemble, which brings certain trouble to maintenance. Sometimes forcibly dismantling, will cause a component or assembly damage?