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 最大允許濃度( tlv )所指的是在所定的濃度環(huán)境下,操作人員可以保持每天8小時,每周48小時的正常工作,而不會對人體造成損害。
The threshold limit value (TLV) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects. Strictly speaking, TLV is a reserved term of the American Conference of Governmental Industrial Hygienists (ACGIH).