以国际标准为基础与国内传统计算方法相比较，探析调节阀口径的计算方法。
Based on the international standard and compared with the domestic traditional method, this article discusses the measurement method of the regulating valve caliber.
等百分比调节阀口径一般较小，当需要大口径调节阀时，实际工程中会采用调节型蝶阀来替代。
When a big adjusting valve is required in a project, the adjusting butterfly valve can be fully in place of the equal percentage adjusting valve.
最常见的是由某种阀来完成，但这也可能是一条皮带，或者是马达速度、口径位置等等。
Most often this is in some kind of valve, but it might also be a belt of motor speed, louver position, and so on.
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