gelatine

• This article presents a discussion on the feasibility of using dye - gelatine type anti - halation layer technique in aerial photographic film . a series of delicate technical problems were solved smoothly , consequently creating a sound basis for running normal practical production
  一、前言人类赖以生存的环境只有一个- -地球,而从目前的状况来看,地球的生态环境正在日趋恶化.其恶化的基本因素在于人为形成的"三废" ,即"废渣" 、 "废气"和"废液" .而五颜六色的废弃包装产品和包装材料又是产生废物的重要来源之一