Oobjectlanguage,目標語言objectplane,物面objectprogram,目標程序objectwave,物體聲束objectiveevidence,客觀證據objectivelensofthescanningelectronmicroscope,掃描電子顯微鏡物鏡objectivelensofthetransmissionelectronmicroscope,透射電子顯微鏡物鏡obliquevisibility,斜能見度observability,可觀測性能觀測性observationandrecordingdevice,觀察和記錄裝置oceanbottomseismograph,海底地震儀oceandatestation,浮標站oceanographicgeologicalinstrument,海洋地質儀器oceanographicinstrumentation,海洋儀器oceanographicmeasuringsystem,海洋測量系統oceanographicobservation,海洋觀測oceanographicsurvey,海洋調查octave,倍頻程octave(bandwidth)filter,倍頻程寬帶濾波器octavefilterset,倍頻程濾波器組odd-evencheck,奇偶校驗off-axisresponse,離軸響應off-line,離線off-lineprocessing,離線處理脫機處理off-linesystemsimulation,離線系統仿真officeautomation(OA),辦公自動化officeautomationsystem(OAS),辦公自動化系統officeinformationsystem(OIS),辦公信息系統officiallyrecognizedstandard,官方認可標準offset,靜差offsetcoefficient,靜差系數oil-filledenclosure(Exo),充油外殼Exooil-watermeter,原油水分儀omegatronmassspectrometer,回旋質譜計omnidirectionalmicrophone,全向傳聲器on-coldcolumninjector,冷柱頭進樣器one-dimensionallocation,線定位一維空間定位on-line,在線on-lineassistence,在線幫助on-linemeasurementandfrequencyspectrumanalysis,在線測量頻譜分析on-lineprocessgaschromatograph,在線過程氣相色譜儀on-lineprocessing,在線處理聯機處理on-linereal-timeprocessing,在線實時處理on-linereal-timesystem,聯機實時系統on-linesystemsimulation,在線系統仿真on-offaction,通斷作用on-offcontroller,通斷控制器one-manatmosphericsubmersible,常人常壓潛水器one-thirdoctavefilter,1/3倍頻程濾波器one-turmtimeofoutputshaft,輸出軸每轉時間one-waycommunication,單向通信open-circuitintermediatevoltage,開路中間電壓openfrontcasewithpressurerelief,帶泄壓裝置的前開式外殼openfrontcasewithoutpressurerelief,無泄壓裝置的前開式外殼(openhole)caliper,井徑儀open-jetwindtunnel,開口式風洞openloop,開環openloopcontrol,開環控制openloopcontrolsystem,開環控制系統openloopelectronicbalance,開環式電子天平open-loopfrequencyresponse,開環頻率響應open-loopgain,開環增益open-loopgaincharacteristic,開環增益特性openlooppole,開環極點openloopprocesscontrol,開環過程控制openloopremotecontrolsystem,開環遙測控制系統openloopstabilization,開環穩定openlooptransferfunction,開環傳遞函數openloopvoltagegain,開環電壓增益openloopzero,開環零點opensource,裸式離子源opensystem,開放系統開環系統opensysteminterconnection(OSI),開放系統互連opentubularcolumn,空心柱openingvalvetime,開閥時間operatingconditions,工作條件operatingerror,工作誤差operatinginfulence,工作條件影響operatinglimits,極限工作條件operatingperiod,工作周期operatingpressuredifferential,工作壓差operatingsystem(OS),操作系統operatingtemperaturerange,工作溫度范圍operatingtime,工作時間operationalamplifier,運算放大器operationalreliability,運行可靠性operationalresearchmodel,運籌學模型operationalunit,運算器operationsresearch,運籌學operativelimits,極限工作條件operator,操作員operatorcommand,操作員命令operator'sconsole,操作員操縱臺operator'sstation,操作員站opticfiberdisplacementmeter,光纖式位移計opticfiberpositionmeasuringinstrument,光纖式位置測量儀opticfiberpressuretransducer,光纖壓力傳感器opticfibertachometer,光纖式轉速表opticfibertachometrictransducer