9.4.2.5. Local exhaust, an air cleaning apparatus, and blowing and suction type ventilation device in accordance with the following provisions shall periodically embodiment annual inspections. <br>a. hood, wear and exhaust duct of the machine, corrosion, and other conditions, and degree of damage of the irregularities. <br>B. conduits or dust accumulation condition of the machine exhaust. <br>C. grease lubrication of machine exhaust. <br>D. Availability of the contact portion of the catheter. <br>E. slack of the belt is connected to the exhaust casing of the motor. <br>F. The ability of the intake and exhaust. <br>g. provided to the discharge conduit of facilities on the sample is solid, corrosion, damage, collapse or otherwise interfere with operational safety considerations. <br>h. Other items necessary to maintain the performance.
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