| 单词 | STELs |
| 释义 | STELs《英文msh词典》STELs [入口词] STELs [主题词] Threshold Limit Values [英文释义] Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA),a short-term value (TLV-STEL),or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3). |
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