In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.
照相技术中，度量副本离原始资料远近
程度。第一次后胶片为第一代胶片。
小摄影;
型胶片录像In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.
照相技术中，度量副本离原始资料远近程度。第一次后胶片为第一代胶片。
In micrographics, a specific method of computer output microfilming in which a beam of electrons is directed onto an energy sensitive microfilm.
图形技术中,一种专门计算机输出胶片方法,其中将电子束直接射对能量敏
胶片上。
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