What is the function of the clean transmission window purified by Hao Ming?

Hao Ming's role in purifying transmission window

1, which is a device for transferring articles in a clean area to reduce the number of door opening;

2. It is mainly used for the transfer of small materials in different levels of clean rooms or small items between clean areas and unclean areas;

3. Prevent low-grade unclean air from entering the high-grade clean room when transferring materials, so as to minimize the pollution of the clean room.