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            书籍正面
            Img book front
            1. 正面右上角的品牌露出,规格如下图。
            2. 书脊顶部的品牌露出,宽度贴合书脊的宽度。
            Img item one
            书籍封底
            Img book back
            3. 背面右下角的品牌和二维码露出,规格如下图。
            Img item three