A lever that sends a telegraph signal when it is depressed and the circuit is closed. 按键时形成闭路以此发送电报信号的杠杆。
Interference from one telegraph circuit to another telegraph circuit or into telephone circuits. 一条电报线路或电话线路对另一条电报线路或电话线路的干扰。
A signal may be considered as some sort of interruption in a field of constant energy transfer. an example is the dots and dashes that open and close the electromagnetic field of a telegraph circuit. 信号可以看作是持续能量转移领域中的某种停顿,例如电报电路的电磁场中起启闭作用的点划。
A teleprinter is really a machine which sends a typewriter message over a telegraph circuit. Teletypewriters ( or teleprinters) became common for commercial use in the 1920s. 打字电报机实际上是一种在电报电路上传送打印信息的机器。1920年代电传打字机普遍用于商业。
Telegraph equations, can be looked as cascade connection of two-port network of lumped circuit of transmission line, is a hyperbolic partial differential equations. 传输线可以看作集中参数二端口网络的级联,其数学模型&电报方程是一阶双曲型偏微分方程组。
Three-phase coupling transmission line equation is derived for the overhead transmission lines based on the distributed circuit theory and telegraph equation. The wave parameter relations between two-phase circuit transmission line equation and three-phase coupling transmission line are achieved. 基于分布参数电路理论,应用电报方程,推导出架空输电线三相全耦合传输线方程,并确定了二相回路传输线方程波参数与全耦合传输线波参数的关系。