oil and gas transportation pipeline

• 油气输送管线

oil and gas transportation pipeline的用法和样例：

例句

1. For the micro-alloyed high strength steel alloy of oil and gas pipeline, repairing of the unqualified welds is one of the main working procedures.
   摘要对于微合金高强度钢油气输送管线，不合格焊缝的返修是主要工序之一。