Send the1990 correspondence to be microfilm or for microfilm.
把1990年的信函送去摄制成缩微胶卷。
A type of microfilm used especially to photograph the pages of books.
微缩胶卷专门拍摄书页用的一种显微胶片
A card or sheet of microfilm capable of accommodating and preserving a considerable number of pages, as of printed text, in reduced form.
缩微平片一个缩微胶卷片, 能够以缩微形式容纳并储存相当多数量的页数, 如一印刷文本的
