threshold limit value

基本解释

OBJECTIVE: To assess the effect of blood lead level on T cell subgroup of children, and the association of T cell subgroup with threshold limit value of blood lead level.
目的：評估血鉛對兒童T細胞亞群的影響，以及血鉛臨界值與T細胞亞群的關系。
Objective: To investigate the acute and accumlative toxicities of hydroquinone in mice and rats and to provide the information for establishing the threshold limit value of hydroquinone.
目的：研究氫醌對小鼠和大鼠的急性毒性和蓄積毒性，爲建立衛生標準提供資料。
While the threshold value reaches its upper limit the optimization design is finished, thus the final distribution form and its sectional dimensions of the reinforced ribs were obtained.
儅閾值達到閾值上限時優化設計結束，從而獲得最終的加強筋的分佈形式及其截麪尺寸。