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)際干線光纜和城鄉(xiāng)電話網(wǎng)為重點(diǎn)。 返回 fiber optic trunk cable