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钢铁是制造生产工具的主要材料。现代工业,不论是重工业或者是轻工业,都需要用钢铁制成的机器来装备。一个年产300万吨的铜铁联合企业,就需要30万吨的机器设备。一个10万纱锭的棉纺织厂,主要的纺织机器就有3,500多台。要实现农业机械化,需要数以十万、百万计的拖拉机、联合收割机和各种的农业机器。现代的交通工具,如火车、轮船、汽车等,也都是大部分用钢铁制成的。在基本建设方面,也需要大量的钢铁。许多规模巨大的工程,都需要大量的各种规格的型钢(工字钢、槽钢、角钢
Steel is the main material for manufacturing tools. Modern industry, whether heavy industry or light industry, needs to be equipped with machines made of steel. A combined copper and iron company with an annual output of 3 million tons will need 300,000 tons of machinery and equipment. A cotton spinning mill with 100,000 spindles has more than 3,500 main textile machines. To achieve agricultural mechanization requires hundreds of thousands of tractors, combine harvesters and various agricultural machines. Modern transportation, such as trains, ships, cars, etc., are also mostly made of steel. In terms of capital construction, a large amount of steel is also needed. Many large-scale projects require a large number of steel profiles of all sizes (I-beam, channel steel, angle steel