ferrodynamic instrument,鐵磁電動系儀表

ferrograph,鐵磁示波器

FET gas transducer[sensor],場效應（管）濕度傳感器

fiber communication,光纖通信

fiducial error,引用誤差

fiducial value,引用值；基值

field,字段；現場

field balancing,現場平衡

field balancing equipment,現場平衡設備

field coil,勵磁線圈

field controller,磁場控制器

field data,現場數据

field desorption(FD),場解吸

field emission electron image,場發射電子象

field emission gun,場發射電子槍

field emission microscope,場發射顯微鏡

field ion emission microscope,場离子發射顯微鏡

field ionization source;FI source,場電离源

field test,現場試驗

field of view,視場

field rdliability test,現場可靠性試驗

field stop,視場光欄

field sweeping,場掃描

field-frequency lock,場頻鎖

fieldbus,現場總線

fieldbus control system(FCS),現場總線控制系統

filament image,燈絲象

filar suspended galvanometer,懸絲式檢流計

file,文件；文卷

file maintenance,文卷維護

fill factor,占空因子；填充率

filled system thermometer,壓力式溫度計

filled thermal system,充灌式感溫系統

film recording thermograph,照相溫度（表）

film sample,薄膜樣品

film varstor,膜式電壓敏電阻器

filter,濾光計；過濾器；濾波器；濾光板；濾線板

filter device,濾光裝置

filtered electron image,過濾電子象

filtered electron lens,過濾電子透鏡

final controlling element,終端控制元件；執行器

final state,終態

final controlling element,終端控制元件；執行器

final state,終態

final temperature,終了溫度終止溫度

Fineman nephoscope,法因曼測云器

finte automaton,有限自動机

fire behaviour,著火性能

fire integrity,整体著火性

fire resistance,耐火性

fire stability,對火穩定性

firmware,固件

fish finder,魚探儀

fitting,管件

five-component borehole magnetometer,井中五分量磁測井儀

fixed core,定鐵芯

fixed(measuring)instrument,固定式（測量）儀表

fixed points method of calibration,定點法標定

fixed resistance input type volt ratio box,定阻輸入式分壓箱

fixed resistance output type volt ratio box,定阻輸出式分壓箱

fixed set point control,定值控制

fixed set point control system,定值控制系統

rixed-based natural frequency,固定基礎固有頻率

flag,標記

flame emission spectrometry,火焰發射光譜法

flame ionization detector(FID),火焰离子化檢測器

flame photometric detector(FPD),火焰光度檢測器

flame proof enclsoure(Ex d),隔爆外殼（Ex d)

flame temperature detector,火焰溫度檢測器

flange pressure tappings,法蘭取壓口

flanged ends,法蘭連接端

flangeless ends,無法蘭連接端

flangeless valve,無法蘭閥

flashing,閃閥

flaw echo,缺陷反射波

flaw resolution,缺陷分辨力

flaw sensitivity,缺陷靈敏度

flexible disk,軟磁盤

flexible manufacturing system,柔性制造系統

flexible rotor,柔性轉子

flexural critical speed,撓曲臨界轉速

flexural principl mode,撓曲主振型

flicker,閃爍

float,浮子

float and cable level measuring device,浮標和纜索式液閏測量裝置

float barograph,浮子气壓計

float level measuring device,浮子液位測量裝置

float level reguator,浮子型液位調節閥

float level transducer[sensor],浮子﹛干簧管液位傳感器

float tide gauge,浮子式驗潮儀

floating accelerometer,重力式測波儀

floating ball,浮置輸入

floating output,浮置輸出

floppy disk drive,軟磁盤机

flow chart,流程圖表

flow coefficient,流量系數

flow conditioner[straightener],流動調整器[整直器]

flow control,流量控制