A. The deck Cranes are in high quality and can load and unload flexibly. B. Deck cranes mounted on vessels for handling cargo and containers in harbour conditions. C. The deck cranes is in easy, safe, reliable operation and can bear long term working time and idle time. D. Sufficient consideration for maintenance, technology, design makes easy maintenance, minimum maimtennace and idle time is the shortest. E. In addition, applicable consideration has been given to weight saving and space restrictions