Reducing the defective index of the cast iron vane, the invention is also favorable for improving the fanefficiency.
降低了铸铁叶片的废品率，同时也有利于提高发风扇效率。
2
Tip load reduction prop fan blade design would be benefit to lowering the noise level as well as to the prop fanefficiency improvement.
桨扇叶尖区采用卸荷设计有利于降噪及提高效率。
3
Through the ID fan to make performance tests to compare the various options that the installation of ID fan motor inverter can increase fanefficiency and save a lot of power.