利在社会功垂千秋——全国公共图书馆缩微抢救工作综述北京图书馆边维华一、图书馆的危机中国东汉时期（公元１０５年）蔡伦发明了造纸术，这一发明直到唐代经中国丝绸之路才逐渐传入欧洲。１５世纪中叶，由于印刷机的问世，使纸张的需求量急剧增长，以麻屑和木棉碎布为原... Lee in the community to work diligently pledges - the national public library microfilm rescue work Summary Beijing Library Bian Weihua First, the library crisis China Eastern Han Dynasty (AD 105) Cai Lun invented the papermaking, the invention until the Tang Dynasty by China Silk Road was gradually introduced into Europe. The mid-15th century, due to the advent of printing presses, so that the rapid growth in demand for paper, linen and rags as raw ...