国产一级在线观看-国内性爱视频-国产成人精品无码免费看夜聊软件-激情久久av-欧美大片在线免费观看-国产一区二区三区毛片-国产精品51-久久激情婷婷-成人网免费看-娇妻av-成人一区二区三区免费

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;