Return. According to official website of Hefei Urban and Rural Construction Bureau, the tower crane is managed by the safety officer, who is the person who conducts daily supervision and inspection of safety production for the team leader and the workers in stations, cars, supermarkets, entrances and exits or elevators according to the national safety production law. Tower crane, referred to as tower crane, originated in western Europe. The movable arm is installed on the upper part of the towering tower, which has a large working space and is mainly used for the vertical and horizontal transportation of materials and the installation of building components in construction.