telco

Vacuum tube amplifiers used the first time in coast - to - coast telco circuits.

真空管放大器首次用于大西洋岸至太平洋岸的電信電路中.

互聯網

Proctor Test Set is a tool used by Telco personnel to diagnose problems with phone lines.

代理測試集是電訊工作人員用來檢測電話線路問題的一種工具.

互聯網