Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Relationship between self-purification time and velocity: Δ vertically unidirectional flow cleanroom with grille floor [6], × measured data of the cleanroom. ○ domestic assembled vertically unidirectional flow cleanroom with full air supply at the ceiling and air return at both bottom sides (authenticated data), ● vertically unidirectional flow cleanroom with full air supply at the ceiling and air return at one bottom side
