| 摘要 |
TITLE: BOUND BOOK WITH BOUND HOLDER CARRYING LOOSE-LEAF PAGES A book containing question or other instructional pages permanently bound therein by a binding such as a spiral wire binding. A holder of small lateral dimension is also bound by the permanent binding and carries loose-leaf answer or work pages secured to the holder by a loose-leaf binding such as a bendable metal strip. The book can be laid open flat or folded back on itself. The work pages can be used up and then replaced. |
