The paper presents characteristic of a explosion-proof combined switch and application of the programmable controller in switch design.
介绍防爆组合开关的使用特点，以及可编程序控制器在组合开关设计中的应用。
2
The explosion-proof function switch also can be the clarinet switch which is composed of the clarinet body and the touch foot of junction circuit.
所述具有防爆功能开关还可为单簧管开关，所述单簧管开关是由单簧管管体和连接电路的触脚构成。
3
Take several kinds of lifting door structure of explosion-proof electric apparatus switch as example to analyze its strong and weak points and its suitable situation.