双面角书签
它有助于文具，如日记本、笔记本和铅笔。它可以提升写作者的写作习惯。
https://sosomoongoo.com/web/upload/NNEditor/20210614/bookmark_2_0_shop1_132023.jpg
https://sosomoongoo.com/web/upload/NNEditor/20210614/bookmark_1_shop1_132139.gif
https://sosomoongoo.com/web/upload/NNEditor/20210614/bookmark_3_0_shop1_132027.jpg
https://sosomoongoo.com/web/upload/NNEditor/20210614/bookmark_4_0_shop1_132029.jpg