已按此工艺生产出满足使用要求的冷拔精密无缝钢管。

With the said process, cold-drawn precision seamless steel tubes up to relevant ap...

youdao

已按此工艺生产出满足使用要求的冷拔精密无缝钢管。

With the said process, cold-drawn precision seamless steel tubes up to relevant ap...

youdao