Individual infinite variable speed drive of each roll with AC-motors coupled to programmable frequency inverters.电机驱动方式为交流变频无极变速驱动。
film wind-up with easy removable bobbins. variable speed drive with clutch for windup.薄膜收卷在易于卸除的卷轴上，收卷速度由带有离合器的速度可调电机控制。