frequency measurement by stroboscope,閃光測頻

frequency measurement by vibrationg reed indicator,用舌簧頻率計測頻

frequency meter,頻率表

frequency modulation（FM),頻率周制，調頻

frequency of the natural hydraulic mode,液壓固有頻率

frequency output,頻率輸出

frequency-phase characteristic,相頻特性

frequency response,頻率響應

frequency response characteristics,頻率響應特性（圖）

frequency reponse locus,頻率響應軌跡圖

frequency response of microphone,傳聲器頻率響應

frequency response range,頻率響應范圍

frequency resonse tracer,頻率響應顯示儀

frequency shift keying(FSK),頻移鍵控

frequency shift magnetometer,頻移磁強計

frequency sounding instrument,頻率測深儀

frequency spectra induced polarization instrument,頻譜激電儀

frequency stabilization,頻率穩定

frequency sweeping,頻率掃描

frequency-temperature coefficient,頻率﹛溫度系數

Fresnal diffraction string,費涅爾衍射條紋

friction bezel ring,壓緊蓋環

friction error,輕敲位移

friction velocity,磨擦速度

front end processor,前端處理机

frontal chromatography,迎頭色譜法

frost point hygrometer,霜點濕度計（表）

full bridge measurement,全橋測量

full capacity trim,全容量閥內件

full-load test,滿載試驗

full scale flow-rate,滿標度流量

full-screen editing,全屏莫編輯

full-screen processing(FSP),全屏幕處理

full-wave logger,聲波全波列測井儀

fully developed velocity distrbution,充分發展的速度分布

fully insulated current transormer,全絕緣電流互感器

fully rough trbulent flow,充分混雜紊流

function,功能

function analysis,功能分析

function block,功能塊

function key,功能鍵

function module,功能模塊

function type optic-fibre temperature transducer,功能型光纖溫度傳感器

functional block,功能塊

functional decomposition,功能分解

functional insulation,功能絕緣

functional similarity,功能相似

functional simulation,功能仿真

fundamental frequency,基本頻率

fundamental method of measurement,基礎測量法

fundamental natural mode of vibration,基本固有振型

fundamental period,基本周期

fundamental wave,基波

funnel-shaped mud viscometer,漏斗式泥漿粘度計

furnace for reproduction of fixed points,定點爐

furnace for verification use,檢定爐

fuzzy control,模糊控制

fuzzy controller,模糊控制器

fuzzy decision,模糊決策

fuzzy game,模糊對策

fuzzy information,模糊信息

fuzzy logic,模糊邏輯

gain,增益

gain margin,增益裕度

gain-crossover frequency,增益交越頻率

galvanic cell,原電池

galvanometer,檢流計

galvanometer gecord type strong-motion instrument,電流計記錄式強震儀

galvanometer with optical point,光點式檢流計

game theory,對策論；博弈樹

gamma directioned radiometer,伽瑪定向輻射儀

gamma processing image,處理象

gamma radionmeter in borehold,井中伽瑪輻射儀

gamma-ray detection apparaturs,射線探傷机

gamma ray level measuring device,伽馬射線液位測量裝置

gamma(ray)spectrometer,伽瑪能譜儀

gamma-rays,射線

gamma ray logger,伽瑪測井儀

gamma sampling radiometer of banded screen,帶屏伽瑪取樣加射儀

gamma scintillator radiometer,伽瑪閃爍輻射儀

gamma spectrometer in borehold,井下伽瑪能譜儀

gamma-spectrometry,伽瑪測量

gas analyzer,气体分析器

gas chromatograph,气相色譜儀

gas chromatograph-mass spectrometer(GC0MS),气相色譜﹛質譜聯用儀接口

gas chromatography,气相色譜法

gas chromatorgaphy-mass(GC-MS),气相色譜﹛質譜法

gas cylinder regulator,气瓶減壓器

gas densitometer,气体密度計

gas-discharge source,气体放電源

gas-enclosed pressure gauge,气密引壓式驗尚潮儀

gas generator,气体發生器

gas laser,气体激光器

gas-liquid chromatography,气液色譜法

gas proportional detector,气体正比檢測器

gas pump thermocouple,抽气式熱電偶

gas purged pressure recording gauge,補气引壓式驗潮儀

gas sensing electrode,气敏電极