久久国产性无码久久久_97人妻在线免费视频_九九热久久这里精品16_亚洲乱人伦片中文在线观看,91cao,91人成网站色www免费下载,91丝瓜,91免费版

In modern medical, how to collect blood become more and more improvement, which from the single collection become to vacutainer collection, now with the use in clinic the vacuum tube blood collection become the main.

At the clinic use, main for blood test and kinds of blood cell culture. In the finished tubes there are EDTA and other medical to prevent blood on wall of tube, and the EDTA can stop blood congeal.

With this kind blood collection device use in clinic which help a lot in cell study, include the blood cell test and analyze, when collect the blood in this kind tube, it can keep blood in activity for long time.

Also the medical add into vacuum tube can keep long time of the effective of the medicine, when blood into the tube can reacted fast and sufficient.