The two different categories are multi-blade wind wheel and high speed wind wheel.

两种不同类别是指多翼风轮和高速风轮。

youdao

With high-speed wind tests of scale models under way, the blended wing could take flight before 2020.

目前，等比例模型的高速风洞测试正在进行中，预计混合机翼能在2020年前起飞。

youdao

To solve these key problems, it is essential to carry out high speed wind tunnel tests and deal with testing technical problems thereof.

要解决这些关键气动力问题，必须进行一系列相关的大型高速风洞试验，以及解决相应的试验技术问题。

youdao

They said the overall strength of storms measured by wind speed might increase two to eleven percent by the year twenty-one hundred.

VOA: special.2010.08.24

Scientists use the Saffir-Simpson Hurricane Scale to measure the intensity of storms based on wind speed.

VOA: special.2010.08.24

This time,scientists hope to learn more about the formation, wind speed and shape of tornadoes.

VOA: special.2009.06.09

The wind gains strength from the thermal energy of the ocean, eventually condensing vapors and circulating air fast enough to form high-speed wind and heavy rain.

CNN: graphic

Sudden changes in wind speed or direction, known as wind shear, can lift or smash aircraft into the ground during landing.

NPR: Investigators Probe Lion Air Crash In Bali

Those teams will also be allowed unlimited out-of-season track testing, with no restrictions on the scale and speed of wind-tunnel testing.

BBC: F1 teams handed ?40m budget cap