全世界共有各种不同规模和类型的港口近万个,其中较大的贸易港约2000多个,分布在140多个国家和地区,年吞吐量超过100万吨有500多个,年吞吐量达1亿吨以上的港口有12个。当今世界港口发展的趋势是:港口规模向大型化发展,港口结构向专业化发展,港口功能向多元化发展,装卸机械向自动 There are nearly 10,000 ports of various sizes and types in the world. The larger one is about 2,000 ports of trade, distributed in more than 140 countries and regions. The annual throughput is over 1 million tons and more than 500. The annual throughput There are 12 ports with more than 100 million tons. The development trend of the world’s ports in the world today is as follows: the port scale has been enlarged, the port structure has been developed professionally, the port function has been diversified, and the loading and unloading machinery has been moved to automatic