They should be flushed effectively

They should be flushed effectively with filtered air. The final stage of the
changing room should, in the at-rest state, be the same grade as the area into which it leads.
The use of separate changing rooms for entering and leaving clean areas is sometimes
desirable. In general hand washing facilities should be provided only in the first stage of the
changing rooms.

結果 (中文) 2:

他们应该有效地过滤空气被刷新。在最后阶段
更衣室应，在静止状态下，是同档次的到它的线索。该地区
进入和离开洁净区使用单独的更衣室有时是
可取的。一般洗手设施应只在的第一阶段提供
更衣室。

結果 (中文) 3:

他们应该被有效地过滤空气冲洗。更衣室的最后阶段，应在休息状态，同一个等级为它所导致的区域，使用单独的更衣室，用于进入和离开洁净区，有时是可取的。一般洗手设施应在更衣室的第一阶段提供。