LEL:爆炸下限(Lower Explosive Limit)
OEL:职业接触限值(Occupational Exposure Limit);
IDHL:立即致死浓度(Immediately Dangerous to life or health concentration)
VOL%: 气体体积浓度百分比
TLV:最高容许浓度 (Threshold Limit Value)
PC-TWA:时间加权平均容许浓度( Permissible Concentration-Time Weighted Average)
PC-STEL:短时间接触容许浓度 (Permissible Concentration-Short Term Exposure Limit)
MAC:最高容许浓度(Maximum Allowable Concentration)
PE:峰接触浓度 (peak exposures)