fractional 分數(shù)的
fractional harmonic 分數(shù)諧波
fractional horsepower motor 分數(shù)馬力電動機
fractional pitch 分數(shù)節(jié)距
fractional pitch winding 分數(shù)節(jié)距繞組
fractional slot winding 分數(shù)槽繞組
frame 框架
frame ground 殼體接地
frame insulation 框架絕緣
frame leakage protection 構架漏電保護裝置
frame yoke 磁軛
francis turbine 法蘭喂式水輪機
free charge 自由電荷
free component 自由成分
free electricity 自由電
free electron 自由電子
free energy 自由能
free magnetization 自由磁化
free neutron 自由中子
free oscillation 自由振蕩
free path 自由行程
free period of circuit 固有周期
free progressive wave 自由前進波
free running multivibrator 自激多諧振蕩器
free space field intensity 自由空間電場強度
freezing 凍結
freezing point 冰點
freezing test 凍試試驗
freon 氟利昂
frequency 頻率
frequency analysis 頻譜分析
frequency band 頻帶
frequency bridge 頻率電橋
frequency changer 變頻機
frequency characteristic 頻率特性
frequency collapse 頻率崩潰
frequency comparison 頻率比較
frequency control 頻率控制
frequency conversion 頻率轉(zhuǎn)換
frequency converter 變頻機
frequency correction 頻率校正
frequency counter 頻率計
frequency demodulator 頻率解調(diào)
frequency detection 頻率檢波
frequency deviation 頻移
frequency discriminator 鑒頻器
frequency distortion 頻率失真
frequency distribution 頻數(shù)分布
frequency divider 分頻器
frequency division 頻率劃分
frequency domain 頻率范圍
frequency doubler 倍頻器
frequency doubling 倍頻
frequency error 頻率誤差
frequency indicator 頻率計
frequency locus 頻率軌跡
frequency loop transfer function 環(huán)路頻率轉(zhuǎn)移函數(shù)
frequency meter 頻率計
frequency method 頻率法
frequency modulated oscillations 檔振蕩
frequency modulation 檔
frequency modulator 檔器
frequency monitor 頻率監(jiān)控器
frequency of starting 起動頻率
frequency range 頻率范圍
frequency regulator 頻率第器
frequency relay 頻率繼電器
frequency response 頻率特性
frequency response analyzer 頻率特性分析器
frequency response correction 頻率響應校正
frequency response equalization 頻率響應校正
frequency response method 頻率特性法
frequency shift 頻率偏移
frequency spectrograph 頻譜儀
frequency spectrum 頻譜
frequency stability 頻率穩(wěn)定度
frequency stabilization 頻率穩(wěn)定
frequency stabilizer 頻率穩(wěn)定器
frequency standard 頻率標準
frequency swing 頻率擺動
frequency system 頻率系統(tǒng)
frequency tolerance 頻率容限
frequency transfer function 頻率傳遞函數(shù)
frequency transformer 變頻器頻率變換器
frequency variation 頻率變動
frequency vector locus 頻率矢量軌跡
friction 摩擦
friction coefficient 摩擦系數(shù)
friction cone 摩擦圓錐
friction coupling 摩擦聯(lián)軸節(jié)
friction gear 摩擦傳動裝置
friction loss 摩擦損失
friction pulley 摩擦輪
frictional electricity 摩擦電
frictional error 摩擦誤差
frictional resistance 摩擦阻力