色标;色码;彩色码;
Recording the red green and blue colour information of a colour positive film separatly on one or two holographic plates with a white light source and three code holograms and three light filters.
通过使用三张编码全息片和三种滤光片,用白光将彩色正片的红、绿、兰三色信息记录在一张或两张全息片上。
This paper presents TN grounding of LV power distribution network. It also discusses the colour code of PE wire in 5-core power cables, calculation of the thickness of outer sheath and selection of conductor size of PE wire.
介绍了低压配电网TN接地型式,并对五芯电力电缆PE绝缘线芯颜色标志、外护套标称厚度的计算及PE线导体截面积选择进行了讨论。
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