线路接口协议 线路接口协议的英文 英语翻译 circuit interface protocol 拓展翻译 伪线路控制块pseudo-line control block无控制线路uncontrolled line无线电通信线路radio link物理线路physical circuit下行线路down link; down path线路circuitry; line; routecircuit; L线路保养工linesman线路闭塞blocking of track线路插口line jack线路插头wiring plug线路常数line constant线路充电容量line charging capacity线路单元line unit线路导线line conductors线路等化器line equalizer线路电缆line cord线路电平line level线路电压voltage between lines线路垫line pad线路短路line short