With the 45° inclined HWA, we measured the steady and unsteady effect in both sides of each rotor of a two-stage counter-rotating axial fan in both near peak efficiency and near stall conditions.
采用45°斜丝热线风速仪(HWA),在近最高效率和近失速工况下测量了一台两级对旋轴流风机的定常与非定常流场。
Among many television textbooks,there exist many problems in the proof of television s maximum image frequency.
在电视教科书中,在对图像最高频率的论证上存在问题,从中选出有代表性的三个版本,通过对三个版本论证的评论,指出了各版本存在的不妥之处,对电视最高频率论证提出了质疑。
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