出伯
出伯-
这一时期，王室衰微，周天子没有力量继续维持统治秩序，各诸侯国以力相争，政出方伯，五霸迭兴，社会进入分裂动乱状态，这就给周边少数民族以发展的机会。
The king of Zhou had not power to keep order , the society came into the split and disorder period .
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运用孔口出流公式、伯努力方程、沿途泄流公式及损失规律，建立了泄流管路的通用方程组。
By means of formula of orifice come out , Bernoulli equation , formula of discharge along way and law of lose , general group of equation of discharge flow was established .