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math formulas written in white chalk and copy space on black board
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math formulas written in white chalk and copy space on black board

编号:440213965版权:Neirfy格式:JPG 大图可转换成tiff文件大小约:17.2MB
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JPG大图3000 x 200025.4 cm x 16.93 cm (300dpi)
JPG中图1000 x 66735.28 cm x 23.53 cm (72dpi)
JPG小图500 x 33317.64 cm x 11.75 cm (72dpi)