There are four levels of visibility Lv: 0 : Lv > 1 W/m 2 1 : 0.7 W/m2 < Lv ≤ 1 W/m2 2 : 0.4 W/m 2 < Lv ≤ 0.7 W/m 2 3: Lv ≤ 0.4 W/m 2 .
確定! 回上一頁