水量分布 meaning in English

water distribution

Agricultural irrigation equipment - rotating sprinklers - part 2 : uniformity of distribution and test methods
农业灌溉设备旋转式喷头第2部分：水量分布均匀性和试验方法
Agricultural irrigation equipment - centre - pivot and moving lateral irrigation machines - determination of uniformity of water distribution
农业灌溉设备中心支轴式和平移式喷灌机水量分布均匀度的测定