韩国一级无码婬片AA片_凹凸视频aⅴ视频在线观看_最近更新中文字幕_日日摸夜夜添夜夜添av

what differences are there? This is certainly not an equipment. The reason is that grinding machine refers to a device that can paste materials into a paste. Comparison with soybean milk machine is also considered.

Colloid mills, on the other hand, can crush higher fineness, but must be colloidal or watery and not hard. The colloid mill used in industry is composed of a rotor and a nail, and it is a special material and requires good wear resistance. It has its own pumping capacity. The degree of grinding can reach nanometer level.