当否的英文
音标:[ dāngfǒu ] 发音:
"当否"怎么读用"当否"造句
英文翻译手机版
- justice
- "当"英文翻译 proper; right
- "否"英文翻译 bad; wicked; evil
- "当夫卢" 英文翻译 : danflous
- "当风为雪而诞" 英文翻译 : when wind for a ice
- "当符号" 英文翻译 : while symbol
- "当风地区" 英文翻译 : exposed area
- "当弗勒维尔" 英文翻译 : danfreville
- "当风地方" 英文翻译 : exposed place
- "当弗雷" 英文翻译 : danfray
- "当风笛响起" 英文翻译 : when the pipers play
- "当弗坦作战" 英文翻译 : operation wotan
- "当风吹起的时候" 英文翻译 : when the wind blows
例句与用法
- The reason that the noise is lower with inclining tongue is : 1 ) both the radius of the tongue and the gap between the tongue and the blade are changed across the wideth ; 2 ) the phase angle between blade and the tongue is changed across the wideth , therefore the peak value of the noise do not appear at the same time , so the peak value of the noise with inclining tongue is much lower than the straight one . the influence of the expanded angle of the shell of the fan on the noise was invested experimentally , and the optimal angle was got
倾斜蜗舌降噪的主要原因是:一是改变了从气流入口侧到风机轮盘的蜗舌间隙和蜗舌半径;二是改变了叶轮与蜗舌非定常相互作用的相位差,使其产生噪声也有相位差,迭加的结果进一步降低了噪声。另外,试验研究了不同蜗壳扩张角对风机噪声及效率的影响规律,蜗壳扩张角选择当否,对效率和噪声影响较大。
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