The direction of luminiferous evacuation indicator is fixed in complex fire accident scene,that is difficult to play safe and effective role in the evacuation instructions.
发光型疏散指示牌的指引方向固定不变,在复杂的火灾事故现场到安全有效的疏散指示作
。
The direction of luminiferous evacuation indicator is fixed in complex fire accident scene,that is difficult to play safe and effective role in the evacuation instructions.
发光型疏散指示牌的指引方向固定不变,在复杂的火灾事故现场到安全有效的疏散指示作
。
Luminiferous gem is the man made modern night shining jewel developed with modern technology by research workers and caused strong echo in gemstone circle.
发光宝石是近期由我国的作者依靠现代
技术研制出的“现代夜明珠”,在宝石界引
强烈反响。
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