Filter

In space and astronautical engineering, a filter is a device or process that removes unwanted particles or impurities from a fluid or gas. Filters are commonly used in spacecraft to purify air and water, as well as to remove contaminants from fuel and other fluids. They are also used in communication systems to remove unwanted noise or interference from signals. Filters can be made from a variety of materials, including paper, cloth, metal, and ceramics, and can be designed to operate at different temperatures and pressures. The effectiveness of a filter is measured by its ability to remove particles of a certain size or larger, known as the filter's micron rating.
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