Deposits of foreign materials will change the sharp contours which govern its coefficient of discharge. 杂质的淤积会改变决定流量系数的轮廓形状。
Improvement of the orifice discharge coefficient may not result in stability improvement as illustrated in one test series. 由一系列的试验说明，喷孔流量系数的改善并没有导致稳定性的改进。
