radio wave penetration system,無線電波透視儀

radioactive materials packaging,放射性物質包裝

radioactive survey,放射性測量

radiodirection finder,無線電方位測定器

radiometer,輻射儀；輻射表

radiosonde,無線電探空儀

radiotheodolite,無線電經緯儀

radiowave penetration instrument,無線電波透視法儀器

rain proof instrument,防濺式儀器儀表

rainfall amount,雨量

rainfall intensity meter,雨量強度計

rainfallmeter,雨量強度計

raingauge,雨量器

raingauge receiver,承水器

raingauge shield,雨量器防風罩

Raman line,拉曼譜線

Raman shift,拉曼位移

Raman spectrum,拉曼光譜

ramp function,斜坡函數

ramp response,斜坡響應

ramp response time,斜坡響應時間

random access,隨机存取

random disturbance,隨机扰動

random error,隨机誤差

random event,隨机事件

random failure,偶然失效

random noise,隨机噪聲；無規噪聲

random process,隨机過程

random signal,隨机信號

random uncertainty,隨机不确定度

random vibration,隨机振動

range,范圍

range-change device,范圍轉換器；量限轉換器

range of load,負荷范圍

range of strain,應變范圍

range of stress,應力范圍

range response time,范圍響應時間

rangefinder,測距儀

ranging distance,測程

Rankine temperature scale,蘭金溫標

rangeability,范圍度

rapid Fourier transform NMR correlation spectroscopy,快速傅立葉變換核磁共振相關波譜法

rapid TG-DTA unit,快速加熱差示熱分析儀/熱天平

rate of change limiting control,變化率极限控制

rate of deformation,變形速率

rate of loading,加荷速率

rate of salt spray precipitation,鹽霧沉降率

rate time,預調時間

rated accuracy limit primary current (of a protective current transformer),（保護用電流互感器的）准确度限定的額定一次電流﹛

Rated broad band random force,額定寬帶隨机激振動力

rated burden,額定負載

rated continuous thermal current,額定的連續熱電流

rated dynamic current,額定動態電流

rated flow coefficient,額定流量系數

rated force under sinusoidal conditions,正弦態額定激振力

rated instrument limit primary current,儀表的額定极限一次電流

rated load,額定載荷

rated operating condition,正常工作條件；額定工作條件

rated operating range,額定工作范圍

rated operating specification,額定工作規程

rated output,額定輸出

rated primary current,額定一次電流

rated primary voltage,額定一次電壓

rated range,額定范圍

rated range of use,額定使用范圍

rated secondary current,額定二次電流

rated secondary voltage,額定二次電壓

rated short time thermal current,額定短時熱電流

rated static longitudinal load,額定靜態縱向負荷

rated static transverse load,額定靜態橫向負荷

rated transformation ratio (of a current transformer),（電流互感器的）額定變比

rated transformation ratio (of a voltage transformer),（電壓互感器的）額定變比

rated travel,額定行程；標稱行程

rated travel time,額定行程時間

rated tube current,額定管電流

rated tube voltage,額定管電壓

rated value,額定值

rated valve capacity,閥額定容量

rated voltage factor,額定電壓因數

rating attraction force,額定吸力

rating power consumption,額定功耗

rating test,標定試驗

ratio chromatism,倍率色差

ratio controller,比值控制器

ratio meter,比率表

ratio of specific heat capacities,比熱比

ratio of the pole spacing to the bore diameter of the pole pieces,极靴的間距与孔徑比

ratio station,比值操作器

ratio thermometer,比色溫度計

raw spectra,原譜

rawinsonde,無線電測風探空儀

reachability,可達性；能達性

reachable set,可達集；能達集

reachable state,可達狀態；能達狀態

reaction gas,反應气

reaction gas chromatography,反應气相色譜法

reaction interval,反應區間；反應程

reaction wheel,反作用輪