一、顺利扩大的铝需要量 1.铝需要量的进展情况在65～73年高速发展期间,日本铝完工制品的需要量,每年以22.2％的比率增加。虽然铝完工制品可分为窗框、铝箔之类的轧制品以及发动机、铝电线等铸锻件。但是,此期间由于相继开发出铝窗框、铝车轮和铝护墙板等轧制品,因此轧制品每年平均增长率连续上升到24.3％,轧制品占整个完 I. Smoothly expanding demand for aluminum 1. Progress in aluminum demand During the period of rapid growth in 65-73, the demand for finished aluminum products from Japan increased at an annual rate of 22.2%. Although aluminum finished products can be divided into window frames, rolled aluminum products like the engine, aluminum wire castings and forgings. However, due to the continuous development of rolling products such as aluminum window frames, aluminum wheels and aluminum siding during this period, the average annual growth rate of rolling products rose continuously to 24.3%