亚洲欧美日韩高清在线看-国产舐足视频在线观看-午夜美女精品视频-一本久久综合亚洲鲁鲁五月天-av午夜免费电影-亚洲国产精品手机在线观看-日本综合亚洲欧美

  Three high mill is a multi pass mill, which is the most commonly used mill. The three rolls of the rolling mill rotate in the same direction from the upper and lower rolls, and the middle roll rotates in the opposite direction. After the rolling piece is rolled out from the pass of the middle and lower rolls, it is transferred to the pass of the middle and upper rolls by the lifting table and the inclined roller table for rolling. Because this rolling mill cuts many grooves on the roll surface, a rolling mill can be used for rolling more than 10 passes, which are mostly used in parallel or semi continuous rolling mills Used as rougher.