Words that probably ring true for every Harry Potter fan.
对每一位哈利波特的影迷来说,这或许是句箴言。
2
The tapered windscreen flow field of the fan is composed of the outer ring turbulent jet and the inner sink, which tightly closes gas and dust to ensure the safety production.
The article introduces an disintegration accident of the fan rotor which is caused by the defection of the guide ring, and analyzing the reasons and putting forward the improving measures as well.