Nose and ears of the war.
You prefer your nose or your ears? In fact, each person will buy a hood face this problem, because most products on the market are two, one effect of the pursuit of smoke fumes, so blindly increase the motor speed to increase the exhaust volume, nose comfortable, but over the kitchen fan rotation noise, cast bronze the ear is very unhappy; the other opposite, the noise is small, but the amount of power and lack of ventilation, fume suction effect of sacrifice, the ears are clean, the nose is Fat. Effects and noise, nose and ears are always trade-off,bronze bushing the industry dubbed the "hood sector Poincaré conjecture," because it is just as famous as difficult to solve mathematical paradox.
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