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fei666:Ans: &r_uQbx 1.灯珠面积选更小的[表情] |r=DBd3 2.灯珠找更小发光角度的[表情] 8I#D`yVKc 3.材料找更高折射率的[表情] W'$kZ/%[ 4.灯珠离TIR再近一些[表情] (2023-01-03 22:49) .]t5q%}j
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