open chain open caisson [建] 沉井；[建] 開口沉箱open burning 露天焚燒；露天燒除open bracket 左方括號open book open bid 公開招標；公開投票open ball wool [經(jīng)濟學]抓毛open ball [數(shù)] 開球open back unrounded vowel open back rounded vowel open axial-flow fan [機械工程]開式軸流風扇open axial flow fan [機械工程]開式軸流風扇open auction 開放式拍賣open as to people [教育學]開放學習對象open arms 張開雙臂open architecture 開放式躰系結搆open application architecture [能源科學技術]開放應用程序躰系結搆open and truehearted 真心善意open and shut valve 雙位開關open and shut controller 自動控制器