If dust and toxic gas are produced in the production process of an enterprise, dust-proof and anti-toxic ventilation measures shall be taken in accordance with the requirements of hygienic standard for the design of industrial enterprises, and open or closed operation is not allowed; if toxic and harmful gas, dust, acid mist, odor, aerosol and other substances are produced in the production process of an enterprise, open operation shall be avoided as far as possible, and if emission to the atmosphere is required, open operation shall be avoided The utility model is provided with purification facilities such as dust removal and absorption.<br>
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