微机继电保护装置应设有在线自动检查。在微机保护装置中微机部分任一元件损坏(包括CPU)时都应发出装置异常信息,并在必要时闭锁保护。
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13型车钩钩体制造标记有()。
A. 制造厂代号
B. 制造顺序号
C. 钩型代号
D. 制造年月
In order to link data centers, a customer is evaluating the installation of fiber optic cable between buildings that are 400 meters apart. The installation will require multiple patch panels and cables. Which of the following is the most critical factor to consider for this installation?()
A. I/O rate
B. bandwidth
C. signal loss
Dense Wavelength Division Multiplexing (DWDM)
下列哪一个不是药店的字号:()
A. 同仁堂
B. 怀仁堂
C. 胡庆余堂
D. 陈李济