UVET tsim xyoo 2009 , yog lub chaw tsim ua cov equipment,
Peb cov khoom siv tau dav siv hauv UV kua nplaum kho,
UV LED luam tawm thiab tshuaj fluorescent tshuaj ntsuam.
UVET tsim xyoo 2009 , yog lub chaw tsim ua cov equipment,
Peb cov khoom siv tau dav siv hauv UV kua nplaum kho,