open

open Cassgrain antenna - 開放式卡塞格倫天線

open channel - 開路通道

open system environment - 開放系統環境

Open Systems Interconnection {=OSI} - 開放系統連結

open two-wire line - 雙明線(傳輸線)

open wire carrier telephone system - 明線載波電話系統

open-circuited line - 開路(傳輸)線

open-loop adaptation - 開迴路調適

open-loop control system - 開迴路控制系統

open-loop DPCM - 開迴路微分博碼調整

open-wire carrier communication - 明線載波通信(系統)

open-wire carrier line - 裸線載波線路，明線載波線路

open-wire carrier telephone channel - 明線載波電話通道

open-wire link - 架空鏈路，明線鏈路

open-wire voice line - 明線話頻線路

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