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Most of the cooling fan Blades were made by engineering plastic material, such as PA66,PA6,and PP which are mixed with 20% to 30% glass fiber. Each fan blade has its regular efficiency. For example, if its primitive design is 2000 RPM with 70W output power, it represents that when the fan blade is running to 2000 RPM, it has 70W exhausted heat efficiency. The setting up standard is based on the input watt, security and noise index.
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