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Since 1986, we have developed more than 700 vessels, many of which have become serialized products. Besides for harbour work, the usage of our vessels covers fire-fighting, icebreaking, environmental-protection, safeguarding and piloting so as to meet different customers’ requirements. We have also developed over ten types of ships with different engines and propulsion systems, including stern tractor type and mid-ship tractor type. Such new types as wind-resistant ships enjoy great popularity among customers.