短語(yǔ)詞組短語(yǔ)CBTC subway trains operation system CBTC 地鉄運(yùn)行系統(tǒng)Subway Operation Service Hotline System 地鉄運(yùn)營(yíng)服務(wù)熱線系統(tǒng) 返回 subway operation system