oil and gas transportation pipeline
英
美
- 油气输送管线
双语例句
- 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。
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