... (st630 to st2000N/mm.layer). Special devices need for spare partsHigh temperature, cold weather, exploration-resistant, ... (Driving rollers and returning rollers)4. Idler rollers parts (Trough idler rollers, parallel idler rollers, adjusting core idler rollers, and impact idler rollers , ... , inverted trough, a funnel and so on)Special services for belt conveyors 1. Tools for fixing, bolts, screw nut, ...