This is called laminar flow because of the concept of one lamination or thin cylindrical sheet of liquid flowing inside another. Other names for this type flow are streamline and viscous flow.
因为液体的薄圆筒层在另一个圆筒内流动，这种流动称为层流或线状流动或粘性流动。
2
Single-faced glue and two-faced glue can be laminated. It has the function of receiving the bottom sheet and laminating many strips at one time and partially lamination coating.