American National Standard for Microfilm Projection Lamps - 2 in. (51 mm) Dichroic Coated Integral Reflector, Rim Reference Tungsten Halogen Lamps with GX5.3 Bases
美国缩微胶片投影灯国家标准-2英寸 (51 mm)二向色涂层整体反射器 带GX5的边缘参考卤钨灯 三垒
ANSI C78。1420-2001(S2018)将缩微胶片投影仪常用的灯具整合为一个性能标准。
ANSI C78.1420-2001 (S2018) consolidates the lamps commonly used for microfilm projectors into a single performance standard.