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fei666:Ans: >(a[b@[K 1.灯珠面积选更小的[表情] **F-#", 2.灯珠找更小发光角度的[表情] ._(5; PB" 3.材料找更高折射率的[表情] :CG;:( | 4.灯珠离TIR再近一些[表情] (2023-01-03 22:49) DhT8Kh{
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