If dust and toxic gas are produced in the production process of an enterprise, dust and poison prevention ventilation measures shall be taken according to the requirements of hygienic standard for design of industrial enterprises, and open or closed operation is not allowed; if toxic and harmful gases, dust, acid mist, odor, aerosol and other substances are produced in the production process, open operation shall be avoided as far as possible. If it is necessary to discharge to the atmosphere, the Dust removal, absorption and other purification facilities are set. Check whether the equipment protection measures are installed, whether they are running and effective.<br>
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