High Performance Industrial Cooling Fan features a 30 "blade diameter."

高性能工业冷却风扇采用了30英寸直径的叶片。

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The cooling effect can also be obtained by providing the cold source components on the blade cover of the electric fan product.

在电风扇产品的叶片罩上设置冷源部件同样有降温效果。

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In addition, the pressure and velocity in cooling fan flow field are analyzed and the relations between flow rate, rotation speed, blade number and aerodynamic noise of cooling fan are studied.

同时，对风扇流场的压力和速度进行分析；研究了风扇流量、风扇转速、扇叶数和气动噪声相互之间的关系。

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Often the only cooling source in a manufacturing plant or warehouse was a ceiling fan, with a yellow ribbon tied to the blade so that people could see that it was really going around.

FORBES: How Big Ass Fans Can Improve Life for Working People, Fix the Economy, and Help Solve World Health Problems.