... 1550/250 mm slab CCM,18X29 ball mill, bell type annealing furnace, 1250mm cantilever straightener etc rivet welding, ... , gear coupling, pin coupling, screw rod, nut, shaft type, sleeve type, roller, supporting roller, working roller, pulley ,wheel and ... as steel structure plant, building frame, spiral conveyor, belt conveyor, charging machine, feeder, bucket elevator, dust cleaner, iron remover, etc ...