main trunk line

基本解释

These gathering systems are normally owned by the pipeline company that operates the main trunk line.
集油管道系统和原油干线管道常归管道公司所有。
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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.
随着这些城镇群的发展，交通问题日益突出，其中干线路网建设滞后是其主要表现。
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 .
公路通车里程将有大幅度的增加，等级有所提高，将建成以高速公路为主的国道干线网。