Cumulative exposure dust

Cumulative exposure level

cumulative exposure level of total 16 polycyclic aromatic hydrocarbons

Cumulative exposure dose

A weighted sound exposure level

Exposure level

Lead dust level

low level exposure

Maximum Permissible Exposure Level

micron level dust

occupational exposure level

Occupational hazard exposure level

Dust exposure

Dust exposure concentration

Dust-exposure

Occupational dust exposure

Workers with dust exposure

coupling mechanism between upper level and low level jet

fiscal system at county level and township level