七十年代末、八十年代初,欧美的一些大铝业公司诸如美国的雷诺金属公司、凯撒铝公司和瑞士铝公司等纷纷对其大型铝压延厂进行技术改造或扩建.如雷诺金属公司耗资1.25亿美元将麦库克厂改建成世界最先进的铝板压延厂;凯撒铝公司投资5000万美元将西德科布伦茨铝压延厂的产量翻番;瑞士 In the late seventies and early eighties, some large aluminum companies in Europe and the United States such as the United States, Renault Metal, Caesar Aluminum and Swiss Aluminum companies have carried out technological transformation or expansion of its large aluminum rolling plant, such as Renault metal company cost $ 125 million to convert the McCook plant into the world’s most advanced aluminum calendering plant; Caesars Aluminum invested 50 million US dollars to double the production of aluminum calendering plant in Koblenz, West Germany; Switzerland