Classification of operational and detection switches for electrical circuit opening/closing and switching in manufacturing equipment and control panels. Includes various switches used in production line control and automation systems such as push button switches, selector switches, toggle switches, limit switches, micro switches, proximity switches, pressure switches, temperature switches, etc. Essential components for NC machine operation panels, safety circuits, position detection, and status monitoring. Distinguished from connectors and control devices like relays, limited to products with direct circuit switching functions.