The wiring may also carry basic servicesignal such as telephone, electrical power and cable television (CATV).
该布线也可以传送诸如电话、电力和有线电视(CATV)的基本服务信号。
2
The precondition of accuracy control of time servicesignal is established on the foundation of time service signal's precise calibration.
授时信号精确控制的前提建立在授时发播信号精确定标的基础之上。
3
In this paper a circuit of filter and shaping is provided for obtaining a better time servicesignal of the China Central Radio Station from a noised record.