计算结果表明：考虑重力后，水轮机进口断面的平均速度、流量和功率都比不考虑重力时大，但效率相差不大。
The results indicate that the average velocity at inlet, discharge and output power of the turbine are higher when gravity is considered, but the efficiency is almost the same as that without gravity.
不考虑岩石的压缩性，忽略重力作用。
Don't consider the compressibility of rock, and ignoring gravitation.
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