Maximum Permissible Exposure Level

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

Exposure level

low level exposure

occupational exposure level

Occupational hazard exposure level

coupling mechanism between upper level and low level jet

fiscal system at county level and township level

interaction between upper level and lower level

municipal level and county level

coal mine permissible explosives

coal-mining permissible explosive

explosive permissible

limit and permissible load

maximum permissible concentration