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ultralongwave spectrometer,超長波光譜儀
ultrasonic anemometer,超聲波風速表
ultrasonic disc cutter,超聲樣品切割機
ultrasonic Doppler blood pressure transduce [sensor],超聲多普勒血壓傳感器
ultrasonic flaw detection,超聲探傷
ultrasonic flaw detector,超聲探傷儀
ultrasonic flow transducer,超聲流量傳感器
ultrasonic flowmeter,超聲流量計
ultrasonic hardness tester,超聲硬度計
ultrasonic level measuring device,超聲物位測量裝置
ultrasonic levelmeter,超聲物位計
ultrasonic methods,超聲法
ultrasonic sensor,超聲（波）傳感器
ultrasonic thickness meter,超聲（波）厚度計
ultrasonic transducer,超聲換能器
ultrasonic wave,超聲波
ultrathin section sample,超薄切片樣品
ultra-violet and visible spectrophotometer,紫外可見光分光光度計
ultraviolet filter,透過紫外線的濾光片
ultraviolet hygrometer,紫外濕度表
ultraviolet lamp,紫外線照射裝置
ultraviolet light transducer [sensor],紫外光傳感器
ultraviolet photo-electron spectrometer,紫外光電子能譜儀
ultraviolet photo electron spectroscopy (UPS),紫外光電子能譜法
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ultraviolet radiation,紫外線輻射
ultraviolet ray intensity meter,紫外線強度計
ultraviolet remote sensing,紫外遙感
ultraviolet-visible detector,紫外—可見光檢測器
unaddressed operation,非尋址操作
unbalance,不平衡
unbalance component measuring device,不平衡分量測量裝置
unbalance mass,不平衡質量
unbalance reduction ratio (URR),不平衡量減少率
unbalance response,不平衡響應
unbalance vector,不平衡矢量
unbalance vector measuring device,不平衡矢量測量裝置
unbalanced output,非對稱輸出
unbiased estimation,無偏估計
unbonded strain gauge,非粘貼式應變計
uncertainty,不確定度
uncertainty of measurement,測量不確定度
uncorrected result,未修正結果
uncoupled modes,非耦合振型
undampted natural frequency,無阻尼固有頻率
undamped natural mode of vibration,無阻尼固有振動模態
under water acoustic measurment,水聲綜合測量儀
underdamping,周期阻尼；欠阻尼
undersea buoy system,水下浮標系統
understandability,可理解性
underwater absorption meter,水下吸收儀
underwater acoustic,水（下）聲學
underwater acoustic communication set,水下通訊裝置
underwater acoustic measurement,水聲測量
underwater acoustic transducer,水聲換能器
underwater camera,水下照相機
underwater communication system,水下通訊裝置
underwater holography,水下全息攝影
underwater irradiance meter,水下輻照度計
underwater lighting system,水下照明裝置
underwater movie camera,水下電影攝影機
underwater panoramic camera,水下全景照相機
underwater polarimeter,水下偏振儀
underwater radiance meter,水下輻射率計
underwater scattering meter,水下散射儀
underwater sound,水（下）聲學
underwater sound integrated measuring set,水聲綜合測量儀器
underwater sound test tank,水聲試驗水池
underwater television camera,水下電視攝像機
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underwater towed system,水下拖曳系統
underwater towed vehicle,水下拖曳體
underwater transducer array,水聲換能器基陣
underwater transmissometer,水下透射率儀
underwater vehicle,水下運載工具
underwater visibility,水下能見度
underwater window,水下“窗口”
undetermined components,非測組分
unearthed voltage transformer,不接地型電壓互感器
uniaxial strain gauge,單軸應變計
uniform stability,一致穩定性
uniform temperature zone,均溫區
uniform temperature zone length,均熱帶長度
uniformity of table motion,臺面運動的均勻度
union nut,雙端螺母
unit,單元；單位
unit(of measurement),（測量）單位
unit area acoustic impedance,聲阻抗率
unit feedback,單位反饋
unit resolution,單位分辨
unit resolution mass,單位分辨質量
unit step function,單位階躍函數
universal balancing machine,通用平衡機
universal gas chromatograph,通用氣相色譜儀
universal head loss coefficient,通用壓頭損失系數
universal testing machine,萬能試驗機
universal toolmaker's microscope,萬能工具顯微鏡
unmanned submersible,無人潛水器
unsaturated standard cell,不飽和式標準電池
unsteady flow,不穩定流
upper-air observation,高空觀測
upper limit of the nominal of use for frequency,標稱使用頻率范圍上限
upward (total) radiation,向上（全）輻射
upward terrestrial radiation,向上地球輻射
urea enzyme transducer [sensor],酶（式）尿毒傳感器
urinary bladder inner pressure transducer [sensor],膀胱內壓傳感器
usable cross-section of the test channel,試驗流道的可用橫截面
usable minimum immersion depth,最小可用浸入深度
useful life,使用壽命
useful spectral range,有效光譜范圍
user adjustment,用戶調整
user layer,用戶層
utility routine,服務程序；實用程序；實用例行程序
utility software,實用軟件
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UV dosimeter,紫外線表
　
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