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optical switching network
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optical switching network
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optical switching network
光交换网络
利用光通信设备和光纤将地理位置不同的、功能独立的多个计算机系统连接起来,不经任何光/电转化,将输入端光信号直接交换到任意的光输出端,实现多台计算机通信的系统。
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occupational diseases induced by physical factors
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occupational electro-optic dermatitis
occupational epidemiology
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occupational exposure limits
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occupational hazard of high frequency electromagnetic field
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occupational hazard risk classification
occupational hazards during the construction and operation in railways
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occupational hazards of ionizing radiation
occupational hazards of non-ionizing radiation
occupational health
occupational health and occupational medicine
Occupational Health and Safety Assessment Series 18000
occupational health examination
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