In dusty areas the filter element may be provided with a pre-separator (air intakeside) in the shape of a foam mat or a fleece.
在高粉尘地区，滤芯可能采用海绵或无纺 布材料来作为预过滤（在进气端）。
2
The same holds true for the intakeside of RUP; there is no activity in inception or elaboration that systematically talks about using models available at the enterprise level.
这对RUP引入方面同样是适用的；在企业级别中，在启始和精化阶段并没有系统地讲述使用可用模型的活动。
3
Just be sure to keep your intake moderate, to be on the safe side.