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Buttons can be classified according to operation mode and protection mode. Common button switch types and features:
1) Open type: Suitable for mounting on the panel of the switch board, control cabinet or console. Codenamed K.
2) Protective type: With protective cover, it can prevent the internal button parts from being damaged by mechanical or human touched parts, code H.
3) Waterproof: Sealed enclosure prevents rain from entering. The code is S.
4) Anti-corrosion type: It can prevent the intrusion of chemical corrosive gases. The code is F.
5) Explosion-proof type: It can be used in places containing explosive gas and dust without causing explosion, such as coal mines. The code is B.
6) Knob type: Rotate the operating contact by hand, there are two positions on and off, generally panel mounted. The code is X.
7) Key type: Use the key to insert and rotate to prevent misoperation or for special operation. The code is Y.
8) Emergency type: There is a large red mushroom button protruding from the outside, and it is used to cut off the power when it is emergency. Codenamed J or M.
9) Combination: Multiple button combinations. Codenamed E.
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