Have you ever gotten a piece of sand or dirt or other small particle in your eye?

你曾经有过沙子、灰尘或其他小颗粒进入眼睛的经历吗？

Small particle size; good mechanical stability.

粒径小；机械稳定性好。

So the control of very small particle sizes is important to the paint industry.

所以在油漆工业，控制很小的粒子的尺寸是非常重要的。

MgO powders, with small particle size, loose structure and high strain energy, have high activity.

晶粒细小，结构疏松，应变能大的氧化镁粉末具有较高的活性。

Small particle size fillers in-crease not only the tenacity, but also the rigidity and heat-resistance.

微粒径填料既可提高片材韧性，又能提高刚性及耐热性。