... advanced world. Steel Castings sand mould making High-precision large ring gear tooth occlusal accuracy of the advanced world. Steel CastingsEfficiency: ... machining use apply to vessel use.(2) Parts for steam turbine.(3) Straight Bollard, bend Bollard,bell mouth,chock etc, ... body, valve body etc. for petrochemical industry working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) Fire ...