The main power switch is an electric control device which is added when the whole machine is in the running process, and the battery is discharged through the outer circuit. At present, the construction machinery and agricultural machinery industry, the vast majority of models have installed power switches. JK series of mechanical power switches, with a strong control, long life, the characteristics of the performance of the. Src= http://www.qipeiren.com/UploadFile/UserProPic/2015/5/18/201505181636431329.jpg "