The feature of Dongyue Tower Crane: Main parts are adopting carbon dioxide arc welding like mast section, pull rod, turn table, etc., deep penetration, small deformation, high strength is the advantage of the welding type. Main chord of mast section is milled by huge milling machine. Speed adjustment of hoisting mechanism is in good condition, hoisting up and down is steady. Slewing mechanism is adopting wirewound motor with steady work, easy and quick position. Contactors are adopting advanced Schneider brand.