telegraph relay
常见例句
- Among these were a relay booster for telegraph lines and a fire-safety curtain for theaters.
其中包括电报线路的继电调压器和剧院防火帘。 - Devices such as the telegraph and telephone relay messages by creating modulated electrical impulses, or impulses that change in a systematic way.
电报机与电话机等设备，通过产生调制电脉冲或以系统化方式变化的脉冲，来传递信息。 - He was the author of a number of discoveries relating to the telegraph industry, including a self-adjusting relay that solved the problem of circuits sticking open or shut, and a telegraph printer—a precursor of what was later called the Teletype machine.
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