fiber optic trunk cable
常見例句
- Increase the ability of correspond by letter, raise the telephone universality rate, take the area trunk line fiber optic cable and the city country telephone nets as the point.
增加通信能力，提高電話普及率，以區(qū)際乾線光纜和城鄕電話網(wǎng)爲(wèi)重點。 返回 fiber optic trunk cable