The glass shutter is that the blade fixes the window structure on the frame of equal rank from some pieces of glass with identical Angle.

玻璃百叶窗是由若干块玻璃叶片以相同的角度，平行地固定在框架上的窗结构。

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Shutter Mounted Industrial Exhaust Fan models are available with a blade diameter of 12 ", 18 ", 24 "or 30".

快门式工业排风扇根据型号，刀片直径分别为12英寸，18英寸，24英寸或30英寸。

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Shutter Mounted Industrial Exhaust Fan models are available with a blade diameter of 12 ", 18 ", 24 "or 30".

快门式工业排风扇根据型号，刀片直径分别为12英寸，18英寸，24英寸或30英寸。

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