"220V AC Cooling Fan" as a fan with: general exhaust fan (commonly known as winnowing fan) performance is relatively poor, an exhaust fan to blow less than a few people, suction fan is not the case, whether it is on the ground with a still hung in the air with. Usually 1000 m2 workshop 4, that room full of wind effect. Suction fan tectonic Frame and shutters are made of galvanized steel mold manufacturing, stamping disposable suction fan blades, using forging gas screw fastening, calibrated by the computer precision balance and low noise, high winds, smooth and reliable operation of blinds fittings manufactured using high-strength steel material.