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一般的英寸都是指對角線,1英寸=2.54CM,所以3.5英寸應該是3.5X2.54=8.89CM 對角線是8.89cm了,計算4:3的比例,按照勾3股4弦5的定律計算,3.5寸荧幕: 長:7.1cm 寬:5.33cm
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