Universal "220V Cooling Fan" Computer technology enables a significant increase in computer use demand relay, the relay with the rapid development of the microprocessor. In the early 1980s, US production of digital time relay can be used to relay commands to control, in combination with the development of microprocessor relays, can form a compact and perfect control system. "220V Cooling Fan" by a computer-controlled industrial robots currently 3.5% annual growth rate, now, computer-controlled production system has been able to produce a variety of low-cost relay in a production line, and can automatically perform a variety of operations and testing the work. Development of communication technology has far-reaching significance for the development of the relay. On the one hand is due to the rapid development of communication technology enables applications to increase throughout the relay. On the other hand, "220V Cooling Fan" Because fiber is the future of the information society transmission aorta in optical fiber communication, optical sensing, optical computing, optical information processing technology to promote the emergence of fiber relays, reed switches, fiber optic The new relay.