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。
Shutter Mounted Industrial Exhaust Fan models are available with a blade diameter of 12 ", 18 ", 24 "or 30".
刀锋的厚度仅相当于80个原子，即发丝直径的五千分之一到一万分之一左右，比市场上的普通刀片要锋利非常多。
They are just 80 atoms thick on their cutting edge - around 1/10,000th or 5,000 times thinner the width of a hair and far sharper than any of common blades on the market.
刀锋的厚度仅相当于80个原子，即发丝直径的五千分之一到一万分之一左右，比市场上的普通刀片要锋利非常多。
They are just 80 atoms thick on their cutting edge - around 1/10,000th or 5,000 times thinner the width of a hair and far sharper than any of common blades on the market.
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