direct loading pipe line

例句：

1. 1.The direct loading pipe line is crucial for the efficient transportation of goods.
   直接装载管道线对于货物的高效运输至关重要。
2. 2.The company has invested heavily in developing new direct loading pipe lines.
   该公司大力投资于开发新的直接装载管道线。
3. 3. The construction of the direct loading pipe line has been a long-standing goal for the city.
   建设直接装载管道线一直是该市长期的目标。