Currently systems with similar performance characteristics, equipped with multispectral optical heat-seeking heads are operational only in the United States and France.
目前系统相似的性能特点，配备了多光谱光热寻的头是可操作的只有美国和法国。
The opposite side of the moving surface is provided with a single absolute type optical rule and two groups of read heads.
以及在该运动台面的相对侧设有单支的绝对式光学尺及两组读头。
2 projecting heads for table cinematographs, 1 optical sound head, 1 carbon arc projection lamp, 1 slide projector and more. All untested.
2个放映机头，用于桌式电影摄影机，1个电子光声头，1台煤油弧光灯，1个滑线电阻，1台幻灯机，1个印片机箱，1个暗房照明灯(煤油)，均未检测。
2 projecting heads for table cinematographs, 1 optical sound head, 1 carbon arc projection lamp, 1 slide projector and more. All untested.
2个放映机头，用于桌式电影摄影机，1个电子光声头，1台煤油弧光灯，1个滑线电阻，1台幻灯机，1个印片机箱，1个暗房照明灯(煤油)，均未检测。
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