低空水平螺旋度
low-level horizontal helicity
差分样条梯度平均因子
Advantages in Natural Resources
地球平均旋转轴
earth’s mean axis of rotation
灰度平均分配
grayscales average distribution
空间平均平衡密度
spatial averaged equilibrium density
螺旋平头垫头螺栓
screw flat countersunk nib bolt
黏度平均分子量
Viscosity-average Molecular Weight
supersonic area rule
viscosity average molecular weight