main trunk line

基本解释

These gathering systems are normally owned by the pipeline company that operates the main trunk line.
集油琯道系統和原油乾線琯道常歸琯道公司所有。
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With the development of these town groups, the transportation problem is also aggrandized increasingly, of which the main manifestation is the lag of the construction of trunk line network.
隨著這些城鎮群的發展，交通問題日益突出，其中乾線路網建設滯後是其主要表現。
The highway is open to traffic the mileage and wills have the significant increment, the grade has the exaltation, will set up at a high speed the highway is the main National Freeway trunk line net .
公路通車裡程將有大幅度的增加，等級有所提高，將建成以高速公路爲主的國道乾線網。