fva 中文意思是什麼
fva
解釋
實時監控指揮管理-
The fva - uv is an opto - mechanical device that controls the amount of light transmitted between two optical fibers. internal disc varies attenuation from 0 - 100 %
Uv是一個光學機械裝置，可控制在兩根光纖之間傳輸的光的數量，內部光片可在0 - 100 %改變衰減率。
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