particle size control agent

例句：

1. 1. The engineer used a particlesize control agent to improve the quality ofthe paint.
   工程师使用了一种颗粒大小控制剂来提高油漆的质量。
2. 2. Themanufacturer claims that their particlesize control agent is environmentallyfriendly.
   制造商声称他们的颗粒大小控制剂是环保的。
3. 3. The researcher foundthat the particle size control agent significantly reducedthe sedimentation rate of the particles.
   研究者发现，颗粒大小控制剂显著降低了颗粒的沉降速率。