理论上，水泵调速高效区为通过工频高效区左右端点的两条相似工况抛物线的中间区域OA1A2(见图1)。
In theory, the pump speed zones for the adoption of efficient frequency efficient area around the endpoint of the two conditions similar to the middle parabolic OA1A2 (see Figure 1).
本文是以燃烧过程的动力机理和燃烧系统的相似理论为基础，结合发动机的几种典型燃烧情况来研究低速燃烧系统稳态工况的模化法则。
Based on similarity Principles and some typical operating mechanisms of combustion engines, the present paper suggests the modeling rules of steady performances of combustors at low flow Mach number.
根据露天煤矿高台阶抛掷爆破现场工况和相似准则，建立了高台阶抛掷爆破的相似试验模型，推导了相似常数。
According to the actual condition of high bench in open cut coal mines and similarity law, a similarity model of high bench casting blast experiment was built and similarity constant was deduced.
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