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fei666:Ans: CUj$ <ay= 1.燈珠面積選更小的[表情] b\H,+|iK 2.燈珠找更小發(fā)光角度的[表情] sRflabl *x 3.材料找更高折射率的[表情] s^/2sjoL 4.燈珠離TIR再近一些[表情] (2023-01-03 22:49) J5}?<Dd:
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