车流速度密度特性
characteristic of traffic flow
带号测度密度
density of signed measure
速度－密度关系
relationship between velocity and density
Velocity-density relation
速度-密度函数
velocity-density function
微血管长度密度
length density of microvessel
温度密度曲线绘图仪
temperature density plotter
赝快度密度
pseudorapidity density
pseudo-rapidity densities