reactive powermeter,無功功率表

read,讀

read-only memory(ROM),只讀存儲器

read-only storage,只讀存儲器

readability,易讀性；可讀度；讀數精度

reading bridge,讀數電橋

reading strain,應變讀數

readjustments,重調

readout time,讀出時間

real gas critical flow coefficient,真實气体臨界流量系數

real-aperture side-looking airborne radar,實孔徑側視雷達

real image,實象

real strain,真實應變

real time,實時

real time analysis,實時分析

real time analyzer,實時分析儀

real-time clock,實時時鐘

real time control,實時控制

real-time control system,實時控制系統

real time date processing,實時數据處理

real time expert system,實時專家系統

real time input,實時輸入

real time output,實時輸出

real time remote control,實時遙控

real time simulation,實時仿真

real time simulation algorithm,實時仿真算法

real time system,實時系統

real time telemetry,實時遙測

real-time trend panel,實時趨勢畫面

realizability,可實現性；能實現性

realization of international temperature scale,國際溫標的复現

rearrangedmolecular ion,重排分子离子

rearrangement ion,重排离子

receiver element,接收器元件

recessed bearing,槽形支承

reciprocal linear dispersion,倒數線色散

reciprocating piston flowmeter,簇复活塞式流量計

reciprocating pump,往复泵

reciprocity calibration,互易法校准

recombination type transducer [sensor],复合型傳感器

record,記錄

recorder,記錄儀

recording,記錄

recording anemometer,風速計

recording chart,記錄紙

recording clock,自記鐘

recording device,記錄裝置

recording instrument,自記儀器

recording(measuring)instrument,記錄（測量）儀器

recording medium,記錄介質

recording snow-gauge,自記雪量計

recording sync,記錄同步

recording theodolite,自記經緯儀

recovery time,恢复時間

rectangular coordinate type potentiometer,直角坐標式電位差計

rectifier,整流器；糾正儀

rectifier instrument,整流式儀表

rectilinear ordinates recording instrument,直線坐標記錄儀

rectilinear vibration,直線振動

recursive estimation,遞推估計

recycle chromatography,循環色譜法

redox electrode assembly,氧化還原复合電极

redox potential meter,氧化-還原電位測定儀

reduced capacity trim,低容量閥內件

reduced model,降階模型

reduced order observer,降階觀測器

reduced viscosity,還原粘度

reducing plane table equipment,歸算平板儀

reduction of area,斷面收縮率

reduction of length,縮短率

redundancy computer system,冗余計算机系統

redundancy unit,冗余單元；冗余設備

redundant information,冗余信息

reentry control,再入控制

reference block [specimen],比較試塊；對比試塊；參考試塊

reference chart,參比記錄紙

reference coil,參考線圈；基准線圈

reference column,參比柱

reference condition,參比條件

reference electrode,參比電极

reference holder,參比物支持器；參比器

reference junction,參比端

reference junciton error(of thermocouple),（熱電偶的）參比端誤差

(reference junction temperture) compensator,（參比端溫度）補償器

reference line,參比線

reference load calibrating machine,基准測力机

reference material,參比物質

reference model,參考模型

reference operating condition,參比工作條件

reference performance characteristice,參比性能特性

reference pressure,參比壓力

reference range,參比范圍

reference sample,參比試樣

reference signal,參比信號

reference sound intensity,參考聲強

reference sound power,參考聲功率

rdference sound pressure,參考聲壓

reference source,參比源