以下为句子列表：
英文: Abstract: The function expression for coefficient of pipeline's local head loss was presented through optimizing fitting to coefficient values listed in tables.The fitting accuracy is acceptable.
中文: 文摘:采用优化拟合法通过对图表中有关数值的拟合，给出了管道阀件阻力系数的函数表达式，具有较高的拟合精度。
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英文: Based on the principle of hydraulics, the general equation for head loss and the formula for calculation of pressure head along the flexible hoses were worked out, and the method for determination of the maximum and minimum heads and their positions was g
中文: 摘要根据水力学原理建立了软管沿程水头损失的一般方程，得出了软管沿程压力水头的计算公式，给出了确定最大和最小压力水头位置及大小的方法，从计算结果与试验实测结果的对比看，具有一定的合理性。
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英文: Features short end-to-end dimensions, light weight stainless steel body, and the lowest head loss available.
中文: 主要特点在于端到端尺寸较短，轻型不锈钢阀体，落差损失最小。
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英文: In the experiments, the primary shape is successfully optimized so as to make the hydraulic parameters better, the problems of lateral short inlet/outlet of pumped-storage plant in which water flow is asymmetric and head loss is too great are all resolved
中文: 对原设计体型成功进行了优化，使各项水力参数达到比较理想的效果，解决了抽水蓄能电站侧式短进出水口在出流时流态分布不均匀与水头损失系数偏大的难题。
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英文: Obtains the theoretical errors of specific frictional head loss including 42.56% for laminar flow, -12.77% for critical area, 8.51% for turbulence smooth area, smaller than 8.51% for turbulence transition area and neglectable error for turbulence rough ar
中文: 计算得到了比摩阻的理论误差：层流区42.56%、临界区-12.77%、湍流光滑区8.51%、湍流过渡区小于8.51%、湍流粗糙区误差可以忽略。
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