1. The frame, made up of a monoblock steel plate, has good strength and beautiful appearance.
2. It is installed without foundation bolts, which is very convenient for installation and maintenance.
3. The surface of the roller, knurled and black coated, is antirust, wearable and has high strength and long service life. The attachment coefficient between tyre and roller is not less than 0.9.
4. It is lifted by gasbag, which has good synchronism and little failure.
5. It adopts high precision sensor, which has high testing accuracy.