用于化学实验中干燥气体或吸收水分，，结构细密、密封性好，，可装填干燥剂，，知足实验室细密剖析与反应装置的使用要求。。

It is used to dry gas or absorb moisture in chemical experiments, with precise structure and good sealing performance, can be filled with desiccant, meeting the requirements of laboratory precision analysis and reaction devices.