Two-high mill is a kind of major equipment for merchant bar production.
二辊轧机是中小型轧钢生产中一种主要的轧制设备。
There are major parts on the face of maintenance equipment and maintenance and production methods.
还有变脸器具上各大配件的保养与维护以及制作方法。
There are major parts on the face of maintenance equipment and maintenance and production methods.
还有变脸器具上各大配件的保养与维护以及制作方法。
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