称量罩是一种用于制药、微生物研究和科学实验等场所专用的局部净化工作室,它提供一种垂直单向气流, 大部分洁净空气在工作区循环，小部分排出至附近区域，使工作区产生负压，防止交叉污染，用于保证工作区的高洁净度环境。

Weighing Booth is a kind of used for pharmaceuticals, microbial research and scientific experiments such as special local purification workshop, it provides a vertical unidirectional airflow, most of the clean air to circulate the workspace, a small number of discharge to the area, make the workspace to produce negative pressure, to prevent cross contamination, is used to ensure clean environment in the work place.