| 摘要 |
Subject: spiral-bound ecological book printed not on paper but on transparent pages. Constitution: transparent pages 1, spiral 2 for maintaining said transparent pages and two monochrome opaque plastic sheets 2, the free monochrome opaque plastic sheet 3, the monochrome opaque plastic sheet fastened to the spiral behind the first transparent page (front page of the book) 4, the monochrome opaque plastic sheet fastened to the spiral before the last transparent page (back page of the book) 5 and the wrapping nylon 6. The printed transparent pages, the free monochrome opaque plastic sheet, the two monochrome opaque plastic sheets fastened to the spiral are all of the same length and width. For reading, the free monochrome opaque plastic sheet should be placed on the back side of the transparent page to be read. |
