借助光栅原理，让屏幕发出的光只能从正面特定角度范围内看到，从而实现「大角度防窥」的效果：
# The Z80 experiment
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Single-character pairs only. Multi-character confusables (rn vs m, cl vs d) are outside scope. These are a known gap in confusables.txt itself.，推荐阅读91视频获取更多信息
Жители Санкт-Петербурга устроили «крысогон»17:52
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