Dopplerflowmeter,多普勒流量計Dopplerradar,多普勒雷達Dopplersonar,多普勒聲納dose,劑量doserate,劑量率doseratemeter,劑量率計dosementer,劑量計dotmatrixprinter,點陣式打印機dotprinter,點陣印刷機點陣打印機dottedlinerecorder,斷續線記錄儀dottingtime,打點時間doubleactingpositioner,雙作用定位器double-beammassspectrometer,雙束質譜計doublebeamspectrumradiator,雙光束光譜福射計doublebouncetechnique,二次反射法doublecollectors,雙接收器double-coneviscometer,雙錐粘度計doublecrystalprobe,雙振子探頭double-drycalorimeter,雙干式熱量計double-focusingmassspectroscope,雙聚焦質譜儀器double-focusX-raytube,雙焦點X射線管doublefocusing,雙聚焦doublefocusinganalyzer,雙聚焦分析器doublefocusingatallmasses,全質量雙聚焦double-imagetacheometer,雙像速測儀doubleinletsystem,雙進樣系統doubleinsulation,雙重絕緣double-junctionSQUIDmagnetometer,雙結磁強計double-magnificationimaging,雙放大倍率成象法doublepanbalance,雙盤天平double-passinternalreflectionelement,雙通內反射元件double-pathratothermometer,雙通道比色溫度計double-polaritymethodforcalibratingthermocouple,熱電偶雙級檢定法doubleprobetechnique,熱電偶雙極檢定法doubleprobetechnique,雙探頭法doubletubemercurymanometer,雙管水銀壓力表dulbletubethermometer,套管溫度表dulblevibrationamplitude,雙振幅downtime,停機時間downholeinstrument,下井儀器downwar(total)radiation,向下全輻射downwardterrestrialradiantion,大氣向下輻射draftstandard,標準草案dragoftowedvehicale,拖曳體阻力drainboles,排泄孔draughtdryingcabinet,電熱鼓風干燥箱drawingforce,拉力dredge,拖曳式采樣器drift,漂移driftbottle,漂流瓶driftcard,漂流卡driftplatedrogue,漂流板driftingbuoy,漂流浮標drivingchart[paper]swaying,走紙偏差drivingdevice,驅動裝置drivingtorque,驅動力矩droopingcharacteristic,下降特性dropsizemeter,滴譜儀droptest,跌落試驗droppingmercuryelectrode,滴汞電極dropsonde,下投式探空儀drosometer,露量表露量器drumrecorder,鼓形記錄儀dryair,干空氣drybulb,干球drygasmeter,干式氣體表dryheattest,干熱試驗dry-bulbthermometer,干球溫度表dryingcabinetonforecdconvection,電熱鼓風干燥箱dryingoven,干燥箱DSCcurve,差示掃描量熱曲線DSCmeter,差示掃描量熱儀DSC-TC,差示掃描量熱儀/熱天平DTArange,DTA,范圍差熱分析范圍dualcomputersystem,雙并列計算機系統復式計算機系統cual-flameionizationdetector,雙火焰離子化檢測器dualpurposevoltagetransformer,雙重用途電壓互感器duet,對兩個換能器的一種布置方式dump,轉儲duoplasmatronionsource,雙等離子體離子源duplex(pressure)gauge,雙工[雙針]壓力表duplextransmission,雙工傳輸duplexedcomputersystem,雙計算機系統durabilitym,耐久性duration,持續時間durationofcycle,周期時間durationofload,負荷保持時間dustanalyzer,塵量分析儀dustcounter,計塵器dustproofinstrument,防塵式儀器儀表dustproofpackaging,防塵包裝dust-proofsolenoidvalve,防塵型電磁閥dwelltime,停頓時間dyemarks,染色測流法dye-penetranttestingmethod,著色滲透探傷法dynamicaccumulationerror,動態累計誤差dynamiccalibrator,動態校準器dynamiccharacteristiccalibrater,動態特性校準儀dynamiccharacteristics,動態特性dynamicdeviation,動態偏差dynamicdisplayimage,動態顯示圖象dynamicerror,動態誤差dynamicerrorcoefficient,動態誤差系數dynamicgauging,動態容積測量法dynamic