工业过程控制阀.第8部分:噪声问题.第3节: 气动控制阀噪声预测法.
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The key point of reducing noise paper machine is to reduce aerodynamic noise of vacuum couch.
降低真空伏辊空气动力性噪声是降低抄纸机噪声的关键.
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Moreover, addition movement of the airframe can result from aerodynamic or propulsion noise.
此外气动力或发动机扰动也会造成弹体的附加运动.
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奔驰的工程师们说,还实施了具体措施,以减少空气动力学的风噪声.
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It is very important to reduce the aerodynamic drag and noise for a transport vehicle.
减小汽车行驶中的空气阻力,抑制行驶时的气动噪声具有十分重要的意义.
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发动机轴流冷却风扇低噪声气动性能分析与控制研究
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