Maximum Permissible Exposure Level

maximum permissible exposure

maximum permissible level

maximum-permissible level

PEL＝permissible exposure limit

permissible exposure

permissible exposure limit

Permissible exposure limits

permissible level

A weighted sound exposure level

Cumulative exposure level

cumulative exposure level of total 16 polycyclic aromatic hydrocarbons

Cumulative Radon Daughter Exposure Level

Exposure level

low level exposure

occupational exposure level

Occupational hazard exposure level

LEVEL level

Light-Exposure and Light-and-Water-Exposure Apparatus

4-level frequency modulation (4-level FM)