Sieve diameter is the length of the side of a square sieve opening through which the given particle will just pass .
“筛析粒径”是指一个四方筛孔的边长，某已知的颗粒将恰好通过这筛孔。
It will increase sharply with the decrease of the diameter of sieve pore.
随着筛孔直径的减小，压力梯度大大增加。
It has been shown that the heat transfer factor is closely related to the surface temperature, but the degree of correlation depends on the particle diameter and sieve range adopted.
结果表明，传热系数与表面温度密切相关，但相关程度取决于颗粒粒径及筛分范围。
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