This paper introduced control valve selection and its application based on the theory of flow characteristic, pressure drop, flashing, cavitation and noise.
针对调节阀的流量特性、压降、闪蒸、气蚀及噪音等问题介绍了调节阀在选型和应用中的要点。
On account of the high pressure and squeezing action, it operates with less noise and vibration than a drop-forge.
由于较高的压力和挤压作用，它比落锤锻造噪声及振动都小得多。
Method By adjusting the parameters of ultrasound diagnostic equipment to drop image noise and enhance image quality.
方法通过调节超声诊断仪器参数达到降躁及增强图像品质。
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