Plant equipment includes a jaw crusher, cone crushers, roll crushers, impact crushers, bucket elevators, conveyor belts, rotary dryers and kilns, wire and rubber screens, rotary screw air compressors, dust collectors, slurry pumps, polyethylene pipe and other rock processing equipment. 2. Install, maintain and repair equipment such as motors, panels, generating equipment, lighting circuits, communication systems, elevators, cranes, hoists, heating units, control.