... advanced world. Steel Castings sand mould making High-precision large ring gear tooth occlusal accuracy of the advanced world. Steel CastingsEfficiency: Annual ... carbon steel, alloy steel, high alloy steel, stainless steel, cast steel as per the Standard GB,JB,CB,ZB,JIS ... Pump body, valve body etc. for petrochemical industry working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) Fire ...