ferrodynamic instrument,铁磁电动系仪表

ferrograph,铁磁示波器

FET gas transducer[sensor],场效应（管）湿度传感器

fiber communication,光纤通信

fiducial error,引用误差

fiducial value,引用值；基值

field,字段；现场

field balancing,现场平衡

field balancing equipment,现场平衡设备

field coil,励磁线圈

field controller,磁场控制器

field data,现场数据

field desorption(FD),场解吸

field emission electron image,场发射电子象

field emission gun,场发射电子枪

field emission microscope,场发射显微镜

field ion emission microscope,场离子发射显微镜

field ionization source;FI source,场电离源

field test,现场试验

field of view,视场

field rdliability test,现场可靠性试验

field stop,视场光栏

field sweeping,场扫描

field-frequency lock,场频锁

fieldbus,现场总线

fieldbus control system(FCS),现场总线控制系统

filament image,灯丝象

filar suspended galvanometer,悬丝式检流计

file,文件；文卷

file maintenance,文卷维护

fill factor,占空因子；填充率

filled system thermometer,压力式温度计

filled thermal system,充灌式感温系统

film recording thermograph,照相温度（表）

film sample,薄膜样品

film varstor,膜式电压敏电阻器

filter,滤光计；过滤器；滤波器；滤光板；滤线板

filter device,滤光装置

filtered electron image,过滤电子象

filtered electron lens,过滤电子透镜

final controlling element,终端控制元件；执行器

final state,终态

final controlling element,终端控制元件；执行器

final state,终态

final temperature,终了温度终止温度

Fineman nephoscope,法因曼测云器

finte automaton,有限自动机

fire behaviour,着火性能

fire integrity,整体着火性

fire resistance,耐火性

fire stability,对火稳定性

firmware,固件

fish finder,鱼探仪

fitting,管件

five-component borehole magnetometer,井中五分量磁测井仪

fixed core,定铁芯

fixed(measuring)instrument,固定式（测量）仪表

fixed points method of calibration,定点法标定

fixed resistance input type volt ratio box,定阻输入式分压箱

fixed resistance output type volt ratio box,定阻输出式分压箱

fixed set point control,定值控制

fixed set point control system,定值控制系统

rixed-based natural frequency,固定基础固有频率

flag,标记

flame emission spectrometry,火焰发射光谱法

flame ionization detector(FID),火焰离子化检测器

flame photometric detector(FPD),火焰光度检测器

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

flame temperature detector,火焰温度检测器

flange pressure tappings,法兰取压口

flanged ends,法兰连接端

flangeless ends,无法兰连接端

flangeless valve,无法兰阀

flashing,闪阀

flaw echo,缺陷反射波

flaw resolution,缺陷分辨力

flaw sensitivity,缺陷灵敏度

flexible disk,软磁盘

flexible manufacturing system,柔性制造系统

flexible rotor,柔性转子

flexural critical speed,挠曲临界转速

flexural principl mode,挠曲主振型

flicker,闪烁

float,浮子

float and cable level measuring device,浮标和缆索式液闰测量装置

float barograph,浮子气压计

float level measuring device,浮子液位测量装置

float level reguator,浮子型液位调节阀

float level transducer[sensor],浮子—干簧管液位传感器

float tide gauge,浮子式验潮仪

floating accelerometer,重力式测波仪

floating ball,浮置输入

floating output,浮置输出

floppy disk drive,软磁盘机

flow chart,流程图表

flow coefficient,流量系数

flow conditioner[straightener],流动调整器[整直器]

flow control,流量控制