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近几十年来,国外的交通运输有很大的发展,高速公路已成为许多国家的主要运输手段。随着高质量的公路建设,采用固定式破碎场集中碎石、汽车运输方式已能适应施工作业的需要。因此人们逐步地采用可移动的破碎筛分联合机组进行碎石作业。在冶金、有色、煤炭、化工等大中型露天矿和水利建设工地上,采用移动式破碎筛分机组代替人工或固定式碎石设备,进行碎石工作,证明是一种比较经济合理的施工方案。
In recent decades, great progress has been made in the transportation and transportation in foreign countries. The expressway has become the main means of transport in many countries. With high-quality highway construction, the use of fixed crushing field concentrated gravel, the car transport has been able to adapt to the needs of construction operations. Therefore, people gradually adopt the movable crushing and screening combined unit for gravel operation. In the metallurgical, nonferrous metals, coal, chemical and other large and medium-sized open-pit mines and water conservancy construction site, the use of mobile crushing and screening unit instead of artificial or fixed gravel equipment, gravel work proved to be a more economical and reasonable construction program .