运用水力学原理，对多孔配水管孔口出流量公式的孔口作用水头、孔口流量系数及沿程孔口出流量的变化问题进行了理论分析和试验验证。
According to hydraulic principle, the change of efficient water head, discharge coefficient and discharge of orifice along porous pipes have been discussed and checked by experiments in this paper.
最后通过对计算结果及回流系数曲线的分析讨论，提出了确定吸气孔口角的原则。
Finally, the principle to determine suction port angle has been reported by analyzing the results and the curves.
最后通过对计算结果及回流系数曲线的分析讨论，提出了确定吸气孔口角的原则。
Finally, the principle to determine suction port angle has been reported by analyzing the results and the curves.
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