The basic idea is to sequentially change the direction or relative flow rate of the two incoming rinsing water streams so that the flow field induced dead zone, formed during the first rinsing period, can be most effectively rinsed.

• 主要想法乃在于分段改变两入漕洗涤水流之方向或相对水量，以便将于首段洗涤时段中因流场特性所形成的停滞区，以最有效的方式洗除。