因接触而发脆的珍贵图书的散页;受潮、被烧损的报纸期刊;由于纸张含酸雨变黄的文献;因折痕而断裂成七零八落的古地图,图书馆和文献馆保存着大量的这些传播以往历史和技术的珍贵文献遗产。当图书馆管理员和文献管理员的判断失误,或由于建筑物搬迁或在大扫除的时候,这些珍贵的资 Loose sheets of precious books that came in contact with them; newspapers that were damp and burned; newspapers that were yellowed due to the acid rain; papers that had been broken down by creases into ancient times; A great deal of these are the precious heritage of literature that has spread past history and technology. When the librarians and bibliographers misjudgments, or relocates, or is in the process of cleaning up, these precious assets