冬季降雪给公路运输带来很大困难。据日本考察,由于雪阻和冰滑,使汽车发动机的输出功率降低20~25％,事故增加2.5~3倍,耗油量增加3~5倍。所以,北欧和西欧各国早就开始研制除雪机械。目前美国、英国、加拿大、日本、苏联等国家常用以下几种方法除雪: 1.机械除雪。采用除雪卡车、除雪平路机、犁刀转子和铣刀转子除雪机、除雪推 Winter snowfall brings great difficulties to road transport. According to the study in Japan, due to snow resistance and ice skating, the output power of a car engine is reduced by 20-25%, accidents are increased by 2.5-3 times and fuel consumption is increased by 3-5 times. Therefore, the Nordic and Western European countries have long been developing snow removal machinery. At present, the United States, Britain, Canada, Japan, the Soviet Union and other countries often use the following methods to remove snow: 1. Mechanical snow removal. Snow removal trucks, snow clearing machines, coulter blades and cutter rotor snow blowers, snow removal pushers