... converter, 1550′ 250 mm slab CCM,18X29 ball mill, bell type annealing furnace, 1250mm cantilever straightener ,kinds of valve, flange, ... reducer, gear coupling, pin coupling, screw rod, nut, shaft type, sleeve type, roller, supporting roller, working roller, pulley ,wheel and so on ... roller, engine seat, rack, box, blank of gear, cover type, sideway, valve body, pulley, connecting rod and so on.Our ...