产品的使用必须包含合适的气源过滤器和水分分离装置。
The installation of the Products must include proper filter and moisture separation on the incoming air supply.
源和目标列中都提供了一个过滤器，可以使字段的查找变得非常容易。
A filter is provided on both the source and target columns to make finding such fields easier.
这个文件的行有四项：源mime类型和目标MIME类型、代价、过滤器的名称。
Lines in this file have four entries: a source and destination MIME type, a cost, and the name of the filter.
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