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Mercury vapor, which is already formed at room temperature, is highly toxic: vapor with a mercury concentration exceeding the TLV (threshold limit value) or OEL (occupational exposure limit value) causes chronic poisoning after prolonged breathing for 5 to 8 hours per day.
Threshold limit value (TLV) means under the condition of a specified concentration, it is not harmful to human beings to keep handling the product for 8 hours a day or 48 hours a week.
In the U.S., the Threshold Limit Value for ECA is 0.2 ppm.
在美國,氰基丙烯酸乙酯(ECA)的 閾限值 是 2 ppm。
The names, sequence, labeling units, rounding intervals and threshold limit value "0" of nutritional components belonging to mandatory labeling content and optional labeling content in nutrition facts shall conform to the provisions of Table 1. When a nutritional component is not marked, the labeling shall be shifted upwards in line with the sequence.
The threshold limit value (TLV) of a chemical substance is believed to be a level to which a worker can be exposed day after day for a working lifetime without adverse effects.
化學物質的臨界極限值(TLV)是指相對於工作人員可以日復一日地工作的工作時間而沒有不利影響的程度。
Examples include: the Threshold Limit Value (TLV) occupational exposure guidelines by the American Conference of Governmental Industrial Hygienists (ACGIH); the Pocket Guide to Chemical Hazards by the United States National Institute for Occupational Health and Safety (NIOSH); Permissible Exposure Limits (PELs) by the Occupational Safety and Health Administration of the United States (OSHA); Indicative Occupational Exposure Limit Values (IOELVs) by European Union member states, or other similar sources.
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