But two big improvements were needed: getting rid of the tether and making the disc suction not just with the outer lip, not just with the outer lip, but also adding suction to individual lamella.

但是需要进行两项重大改进：摆脱系绳并使圆盘吸力不仅与外唇，不仅与外唇，而且还增加了对单个薄片的吸力。