Field device connection between the application process is a logical connection, or as soft connections. This communication link is also called the virtual communication relationship. Foundation Fieldbus three virtual communication relationships: client / server model; report is divided hair; publish / subscribe to receive type. Slowly lift the clutch is soft connection between the gear with smooth. For the start. Quickly lift the clutch is hard-wired. Generally used to accelerate the shift. 
 For a variety of high-voltage electrical appliances, vacuum appliances, mining explosion-proof switch and motor vehicles, motorcycles and other related products to do the soft connection with, the use of bare or tinned copper braided wire (stranded wire), made with the cold method. 
 To one side silicone coated fiberglass fabric, made of silicone cloth, cut the desired shape and size made to corrosion dust and so on.