土方、起重机械是建筑、冶金、能源、交通等生产建设的重要物质基础,其质量的好坏直接关系到用户的使用安全、企业的生产效率和经济效益。为促进厂家提高产品质量,更好地为用户服务,从1990年3月起对各用户单位1985年以来使用的国产土方、起重机械质量进行了用户调查评议,现将用户 Earthwork and hoisting machinery are important material foundations for construction, metallurgy, energy, transportation and other production and construction. The quality of the products is directly related to users’ safety, production efficiency and economic benefits. In order to promote manufacturers to improve product quality and better serve users, from March 1990 onwards, user surveys were conducted on the quality of home-made earth-moving and lifting machinery used by various user units since 1985, and users are now