busy relay 占線繼電器

busy period distribution [數(shù)學]忙期分布

busy period [計][通信] 忙碌期間 忙期

busy oneself with nothing 無事空忙

busy oneself with 忙于

busy oneself to no purpose 白忙

busy oneself in running about 力疾奔走

busy oneself in 使忙碌；使忙于

busy morning and night 夙夜匪懈

busy month in business [經濟學]旺月

busy market [新聞學與傳播學]繁忙的市場地區(qū)

busy line [通信] 占用線路；[計][通信] 忙線路

busy life 忙碌的生活

busy indicator [通信] 示忙器 占線指示器

busy in 忙于…

busy idle condition [電子、通信與自動控制技術]忙閑條件[計算機科學技術]忙閑條件忙閑情況忙閒情況

busy hour traffic [電子、通信與自動控制技術]忙時話務量

busy hour call bhc [電子、通信與自動控制技術]忙時呼叫

busy hour call attempt 忙時呼叫嘗試

busy hour call [電子、通信與自動控制技術]忙時呼叫[機械工程]忙時呼叫