短語(yǔ)詞組短語(yǔ)national main trunk line 國(guó)道主干線(xiàn)main trunk railway line 主要干線(xiàn)nationing main trunk line 國(guó)道骨支線(xiàn)main starting valve trunk line 主要干線(xiàn)管路Singapore -Lasa main trunk line 新加坡main trunk of hydraulic line 輸水線(xiàn)路總干 返回 main trunk line