一在技术比较先进的发达国家与发展中国家之间,由于经济和商品贸易往来的不断增加,对于发展集装箱运输的要求越来越迫切。但经济实力有限的发展中国家和一些发达国家的中小港口,集装箱运输的运量并不一定很多,所以,就出现了集装箱与其他货种同船“混装”的运输形式。这就要求码头的装卸工艺和装卸机械必须具有“多功能”。 In the more advanced developed countries and developing countries, due to the continuous increase of economy and trade in goods, the requirements for the development of container transport are becoming more and more urgent. However, the container shipping capacity of the developing countries with limited economic strength and the ports of small and medium-sized developed countries is not necessarily large. Therefore, there has been a “mixed” mode of transportation of containers and other cargoes on the same ship. This requires that the dock loading and unloading process and handling machinery must have a “multi-purpose” function.