日韩在线不卡-男男在线观看-欧美激情自拍-潘金莲三级80分钟-男生裸体视频网站-a中文字幕-国产资源网站-亚洲一二三区在线-国产美女作爱全过程免费视频-欧美亚洲日本一区-国产色一区二区-亚洲一级黄色av-亚洲 欧美 变态 国产 另类-法国性视频-爽爽淫人综合网网站

Product features:

1. Germany Knauer company imported original valve to ensure product quality;

2. Built in sensor to provide start signal for integrator and workstation;

3. The injection volume is 1ml to 25ml to meet the needs of small-scale preparation in the laboratory;

4. The price is favorable and the cost performance is very good;