Zhejiang Communications Vocational School. According to Baidu map, the professional course name of Zhejiang Communications Vocational School is Sanguanlun, and the training target is seafarers and related seafarers, and the type is Xinpei. Three-pipe wheel is one of the duties of seafarers, responsible for the daily management of ship engine room equipment, especially the operation and operation of main engine and auxiliary engine, the maintenance and storage of engine room equipment and the maintenance of other mechanical equipment on board.