97人人添人人爽一-97人人添人人澡人人澡人人澡-97人人添人澡人人爽超碰-97人人夜夜视频精品-97人人澡-97人人澡人人爽

  The open type two high up adjusting mill is composed of two horizontal rolls arranged up and down in the same vertical plane. Mainly used in metal rolling process. It can be divided into reversible type and irreversible type. The reversible type includes blooming mill, rail beam mill, medium and heavy plate mill, etc. The irreversible type includes billet continuous rolling mill, laminated sheet rolling mill, sheet or strip cold rolling mill, temper mill, etc.