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7寸照片是多少乘多少
更新时间: 2020-10-31 00:00:00  

7寸照片是17.8厘米乘12.7厘米。照片的尺寸是以英寸为单位,1英寸等于2.54cm。照片,指用感光纸放在照相底片下曝光后经显影、定影而成的人或物的图片。照片区别于其他图片的最主要一点是在输出方式上,照片的输出方式是在完全封闭的暗室内(在一大型机器里面)由激光扫描曝光而成。

关键词: 照片 多少

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