6 TYPES OF ROLLERS COMMONLY USED FOR
· Various types are available having different diameters and widths of drum and different lengths and shapes of feet The most common type is the one having two drums meters wide and either as taper foot or club foot rollers according to the shape of the feet Area of each protrusion can vary from 30 to 80 cm 2 The coverage area is about 8 to 12% …