美国威斯康星（Ｗｉｓｃｏｎｓｉｎ）Ｍｏｎｉｔｏｗｏｃ起重机公司已推出一种新款格构式起重臂履带式吊车，以取代流行的Ｍ－５０吊车。该新型号吊车命名为２２５０，其长起重臂起重能力增加４０％，外伸可及范围也增大４０％；起重性能得以改进；驾驶室保温、隔声和保护功能? Monitowoc Crane Company, Wisconsin, USA, has introduced a new lattice boom crawler crane to replace the popular M-50 crane. Named the 2250, the new crane has a 40% increase in lifting capacity for long jibs and a 40% increase in reach; lifting performance improvements; cab insulation, noise insulation and protection features;