A column plug 2 through which medicine can be adsorbed is arranged in the center of the cottoncushion.
在该棉垫的中心处安装有一个能吸附药物的柱塞2。
2
The column plug 2 can be directly fixed on the rectangular cottoncushion 1 and can also be fixed on the rectangular cottoncushion 1 through a connecting line 3.