The environmental contamination, which is occurred by traffic tools, is regard as a serious problem. This passage takes a process of automobile door's design as an example to show the method of declining the mass of vehicle. Through which way the emissions can be reduced effectively.%交通工具造成的环境污染问题引起了社会各界的普遍关注.以车门的设计为例,展示了如何在不影响车辆的使用数据,如强度、刚度等和不增加生产成本的前提下,有效地减少车门的总重量,以达到降低汽车尾气排放污染的目的.
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