系统通过双阶炭过滤中和且除去第2和第4个槽桶中溶有的表面活性成分。
Filter A neutralises and removes surfactants from tanks 2 and 4 through a two stage carbon filter.
木及木基板制内门。第2部分：门槽。术语尺寸和要求。
Interior doors made from wood and wood - based panels - part 2: door crozes; concepts, sizes, installation.
钢和吕伯槽是最常见地室第系统中运用地资料。
Steel and aluminum gutters are the most common materials used in residential systems.
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