In micrographics, a specific method of computer output microfilming in which a beam of electrons is directed onto an energy sensitive microfilm.

缩微图形技术中,一种专门的计算机输出微缩胶片方法,其中将电子束直接射在对能量敏感的缩微胶片上。

In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.

在缩微照相技术中，度量副本离原始资料远近的程度。第一次缩微后的胶片为第一代缩微胶片。