... .0m/s,1.25m/s,1.6m/s,2.0m/s,2.5m/s,3.15m/s,4.0m/s. ... . Or using an electronic roller as a driving device.)2. Roller parts (Driving rollers and returning rollers)3. ... , bolts, screw nuts, and other spare parts can free supplied.2. Special request: as the buyer's demand to design ... promiseAll of our products have one year guarantee for free change and repair. Expolsion-proof belt conveyor machinery for ...