Plumbers are steadily switching from copper pipes to plastic ones; and the Chinese have found a way of substituting the metal with cheaper aluminium in air-conditioning units.

水管工们已逐渐用塑料管代替铜管，中国也已用更便宜的铝代替空调元件。

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A blackened aluminium framework contains the glazing, which includes sliding sections that can be opened to let fresh air into the interior.

玻璃安装在黑铝框架内，滑动部分可以打开，让新鲜空气进入室内。

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This paper analysed on the present situation of the air quality in Shanxi Aluminium Plant, some Suggestions against directed pollution condition were put forward.

本文对目前山西铝厂地区的环境空气质量现状进行了分析，并针对污染状况提出改进建议。

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