The equipment is classified according to the dust class.<br>L (mild hazard) is to isolate dust with a limit of occupational exposure over 1 mg / m3<br>Suitable.<br>M (moderate risk) is to isolate dust with a limit of occupational exposure over 0.1 mg / m3<br>Suitable.<br>H (the high risk) is the total limitation of occupational exposure, including carcinogenic and pathogenic dust<br>Is suitable for separating all the dust.<br>
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