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fei666:Ans: C'A]i5 1.灯珠面积选更小的[表情] ]bi)$j.9s 2.灯珠找更小发光角度的[表情] Zm ogM7B 3.材料找更高折射率的[表情] q2rUbU_A( 4.灯珠离TIR再近一些[表情] (2023-01-03 22:49) ,TJD$^
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