Erk, seems to have chopped off half of my last post.
Anyway, the Edro DynaWash is a pocket washer... pocket washers tend to have a drum which is then divided into 3 or 4 separate compartments, or "pockets" of which only one is accessed at a time as shown in the first picture at the top. Pocket machines allow commercial laundries to wash similar loads but for separate customers, for example, all at once. So for exmaple, if a commercial laundry is washing white sheets for 4 laundries, Hotel A's sheets will go in pocket 1, Hotel B's sheets in pocket 2 et cetera.
Hope this clarifies!
Jon