H-Ru 11(平均值)21体系
H-Ru 11(average)21 system
(算术)平均值
arithmetic)avera ge value
(平均值)f-属性控制
average)f -attribute control
函数在区间上的平均值
average value of a function on an integvals
几何平均值
Geometric mean value
geometric average
geometric mean
value of geometrical average
geometry mean value
geologic time division
GE