1.造船工业发展迅速,极需高效经济钢板我国国民经济的发展进入了新的历史时期,能源、交通是经济发展的战略重点之一。交通中有水运、能源中有海上石油的开发,各类船舶和海上钻、采平台的建造都要由造船工业部门来承担,因此近年来发展较为迅速。所建船舶的载重吨位已从过去的3000～5000t级,发展到10000～00000t级; 1. The rapid development of shipbuilding industry, it is highly efficient economic plate China’s national economy has entered a new historical period of development, energy, transportation is one of the strategic priorities for economic development. There are water transport in traffic, the development of offshore oil in energy, the construction of various types of ships and offshore drilling and mining platforms are all undertaken by the shipbuilding industry sector, and therefore the development has been relatively rapid in recent years. The construction of the ship’s deadweight tonnage from the past 3000 ~ 5000t class, developed to 10000 ~ 00000t level;