“向阳4号”8吨轮胎、轨道两用起重机(见图1),是由我队同北京市建筑工程研究所组成的三结合小组,试制成功的新型起重机。它能满足一般工业厂房和六层以下民用住宅的材料、构件等垂直运输,以及解决施工现场预制构件的搬运装卸和立、拆塔等作业。 “Xiangyang 4” and "8 tons of tires and rail dual-purpose cranes (see Figure 1) are three-combination teams composed of our team and the Beijing Institute of Building Engineering. It can meet the vertical transportation of materials, components, etc. of general industrial plants and civil housing below six levels, as well as the handling of prefabricated components at the construction site, such as handling, loading and unloading of towers.