亚洲v无码一区二区三区四区观看,欧美重口另类在线播放二区 ,欧美精品videosse精子,乱人妻中文字幕

Video Explanation

1. Back extrusion: the extrusion method in which a part of the sample flows out along the gap between the probe and the cup wall, and the flow direction is opposite to the movement direction of the probe.

2. Applications: liquid and semi solid samples, such as cream, ice cream, jam, honey, facial mask, cleansing cream, shampoo, etc.