履带式起重机是一种工程起重机,和汽车起重机与轮胎起重机相比,它的特点是: 1.履带行走机构对地面的比压较小,能在松软的地面上行走与作业; 2.可以在原地转弯;如果是全液压式展带起重机,由于两条履带可以朝相反方向驱动,还能使整机绕自身的中心就地回转; Crawler crane is an engineering crane, and truck crane compared with the tire crane, which is characterized by: 1. Crawler walking mechanism on the ground is relatively small, can walk and work on a soft ground; 2. Can be in the original Turn; in the case of a fully hydraulic spreader crane, the two tracks can be driven in the opposite direction and the entire machine can swivel around its center;