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for dBm ,dB,dBi, The following description is correct ().
(Select 3 Answers)
dBm : Absolute value of characterizing power
dBi and dBd : Characterize the relative value of gain
dB : The relative value of characterizing power
If the antenna of A is 12dBi , The second antenna is 14dBi , It can be said that A is smaller than B 2dBi
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