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nature : means for the preparation of sterile air or fiber-bed medium ultrafine membrane filters. Fiber media is mainly cotton, is commonly used glass fiber membranes and membrane pore size of 0.2 µ m PTFE membrane. Filters use their own application before the steam sterilization or other methods. Through the air filters for dust removal in advance, with the exception of a drop of water, and attention to controlling the relative humidity, it does not in the filter membrane layer or precipitate exposed to moisture and lead to failure. Commonly used in the field of biotechnology.
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