A user can scratch the cover and text it to a designated number.
使用者可以刮去表层，得到一串代码，将之发短信去一个指定的号码。
This text also design the process to carry on elaborate to a cover molding tool.
本文也就对日用品中的笔盖模具设计过程进行阐述。
Self-cover: Cover of a booklet MADE of the same paper as the text pages.
书页纸封面：小册子的书皮和内文，用同样纸张。
Self-cover: Cover of a booklet MADE of the same paper as the text pages.
书页纸封面：小册子的书皮和内文，用同样纸张。
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