Biological exposure limit
Occupational exposure limit
Biological exposure index
biological exposure indicator
Biological exposure indices
Biological exposure limits
Exposure Limit
暴露限值
曝露限值
曝露界限
耐受限
接触限值
暴露限制
曝露极限
卫生标准
external exposure limit
Limit Values of Axial Compressive Ratio
lower limit values of anomalies
PEL＝permissible exposure limit
permissible exposure limit
recommended exposure limit