Because of the problems with SCBA systems, any respirator that you are likely to use will have a filter that purifies the air you breathe.

由于SCBA系统存在的不足，任何您可能用到的呼吸器都会有一个过滤器来净化呼吸所需空气。

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In the 1980s, the first air intake systems were offered and consisted of molded plastic intake tubes and a cone-shaped cotton gauze air filter.

在1980年代，进气系统第一次提出了模塑料进气组成，一个锥形棉质纱布管和空气过滤器。

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Nylon prefilters are widely used in fan filter units, indoor filtration systems, and systems with high air volume.

良好的除尘性，可以广泛用于风机单元，扩散的室内设备及大风量的通风系统中。

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