国产在线视频一区二区三区四区,中文字幕一区在线观看视频,免费无码一区二区三区蜜桃大,亚洲色偷偷偷鲁精品,无码精品人妻一区二区三区免费看,一区二区三区五区无码,日韩另类动漫一区二区

1. With the design of bell shaped cylinder head, the sample distribution is more uniform, the sample loading amount can be increased, and the resolution efficiency can be improved;

2. The bellmouth column head can prevent the high-speed flow from damaging the column bed;

3. The stainless steel jacket of the inner glass lined tube of the upper sample column replaces the traditional quantitative ring of the flow injection valve, which is conducive to the preparation of high concentration samples and thorough elimination

4. In addition to the phenomenon of high concentration sample blocking the valve interface;

5. Flange column is easy to disassemble and clean;