The test results show that the spheric particle size is not cubuge particle size as the single diameter of spheric particle, but to as a series of combination of particle distribution.

• 球形颗粒在激光粒度测量中既不等效于等体积的球形颗粒也不等效于其他的某种单一直径的球形颗粒，而是一系列大小不同的球形颗粒的组合；