These in turn gave way to ever smaller and more capable electrical devices in which numbers were crunched by relays, valves and ultimately transistors.
这些反过来又被更小、更强大的电气设备所取代，其中的数字由继电器、阀门和最终的晶体管来处理。
| 单词 | Relay Valve |
| 释义 |
Relay Valve
原声例句
经济学人 Culture These in turn gave way to ever smaller and more capable electrical devices in which numbers were crunched by relays, valves and ultimately transistors. 这些反过来又被更小、更强大的电气设备所取代，其中的数字由继电器、阀门和最终的晶体管来处理。
英语百科
Relay valveA relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle than the front of the vehicle, where the front service brakes, foot-valve, parking-control valve, and trailer-supply valve (if applicable) are located. |
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