flow elbow,流量彎管

flow measurement calibration device,流量測量校准裝置

flow measuring device,流量測量裝置

flow nozzle,流量噴嘴

flow profile,流動剖面

flow rate of mobile phase,流動相流速

flow sihnal,流量信號

flow stabilizer,流量穩定器

flow switch,流量開關

flow to close,流關

flow to open,流開 flow transducer[sensor],流量傳感器

flowmeter,流量計

flow-rate,流量

flow-rate range,流量范圍

fluctuation,波動（度）

fluid damping galvanometer,液体阻尼振動子

fluidic flowmeter,射流流量計

fluorescence,熒光修正

fluorescence detector,熒光檢測器

fluorescence effect,熒光效應

fluorescent image,熒光象

flurescent magnetic partcle,熒光磁粉

fluorescent magnetic particle inspection machine,熒光磁粉探傷机

fluorescent penetrant festing method,熒光滲透探傷法

fluorine plastic,氟塑料

fluorine rubber(viton),氟橡膠

fluorometer,熒光計 flush mounted(pressure)gauge,，嵌裝壓力表

flutter,顫振

flux constant,磁通常數

flux meter,磁通表

flux of radiation,輻射通量

fluxgate compass,磁通門羅盤

fluxgate magnetometer,磁通門磁力儀；磁通門磁強計

fluxmeter,磁通表

fluxmeter calibrator,磁通表校驗儀

focal distance,焦距

focal plane,焦平面

focal point,焦點

focus,焦點

focus size,焦點尺寸

focus-to-film distance,焦距

focusing,聚焦

focusing type probe,聚焦探頭

fog-gauge,霧量器

foil strain gauge,箔式應變計

folding chart[paper],折疊式記錄紙

follow-up control,隨動控制

follow-up pointer,從動針

food analyzer,食品分析儀

force,力

force-balance acceleration transducer,力平衡式加速度傳感器

force-balance accelerometer,力平衡式加速度計

force convection,強近對流

force standard machine,力標准机

force transducer[sensor],力傳感器

forced vibration,強迫振動；受迫振動

foregraound,前台 foreground processing,前台處理

foreground program,前台程序

form factor,波形因數

Fortin barometer,福丁气壓表

forward channel,正向信道

Foundation Fieldbus(FF),基金會現場總線；FF總線

four-terminal standard resistor,四端（鈕）標准電阻器

Fourier transform,傅里葉變換

Fouier transform ion cyclotron resonance mass spertrometer (FT-ICR-MS), 傅立葉變換离子回旋共振質譜計

Fourier transform infrared spectrometry,傅立葉變換紅外光譜法

Fourier transform spectrometer,傅里葉變換光譜儀

fracture toughness,斷裂韌性

fragment ion,碎片离子

fragmentation,碎裂過程

frqgmentation pattern,碎裂圖型

frame,幀 framework,框架

free falling STD profilinge system,自返式溫鹽深剖面儀

free field,自由聲場

free field correction curves,自由場修正曲線

free-field frequency response of microphone,傳聲器自由聲場頻率響應

free field reciprocity calibration,自由聲場互易校准

free-field sensitivity of microphone,傳聲器自由聲場靈敏度

free induction decay signal;FID signal,自由感應衰減信號

free oscillating period,自由振動周期

free swing of pendulum,擺錘空擊

free vehicle respirometer,活動式海底生物呼吸測量器

free vibration,自由振動

freezing heat,凝固熱

freezing point,凝固點

frequency,頻率

frequency-amplitude characteristic,幅頻特性

frequency analysis,頻率分析

frequency analyzer,頻率分析儀

frequency band,頻帶

frequency distrbution,頻率分布

frequency division multiplexing,頻分多路傳輸

frequency domain,頻域

frequency domain analysis,頻域分析

frequency domain method,頻域法

frequency domain model reduction method,頻域模型降价法

frequency index,頻率指數

frequency measurement by comparison with time scale,時標比較法測頻