看到导游的导游看到的直缝埋弧焊只有大约2 高。
X级管线钢板材是生产直缝埋弧焊管的主要原材料。
The X grace steel sheet is used as main material for SAW straight weld pipes for pipe line purpose.
用切块法实测了某大口径X70双面直缝埋弧焊管内的残余应力。
The residual stress in a heavy caliber X70 double-surface straight-seam submerged arc tube was measured using the piece-cutting method.
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