... sternpost system, such as rudder blade, quill shaft,anvil stand,support roller,cast steel joints for bridge,gear,integrated chassis ... the area of metallurgy, mine, power plant,railroad, cement, engine bed, wind electricity, astronautics, shipbuilding and so on. We can ... . Its main products include rudder blade, quill shaft,anvil stand,support roller,cast steel joints for bridge,gear,integrated chassis ...