underwater sound test tank,水聲試驗(yàn)水池
underwater television camera,水下電視攝像機(jī)
underwater towed system,水下拖曳系統(tǒng)
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(yùn)載工具
underwater visibility,水下能見度
underwater window,水下"窗口"
undetermined components,非測(cè)組分
unearthed voltage transformer,不接地型電壓互感器
uniaxial strain gauge,單軸應(yīng)變計(jì)
uniform stability,一致穩(wěn)定性
uniform temperature zone,均溫區(qū)
uniform temperature zone length,均熱帶長度
uniformity of table motion,臺(tái)面運(yùn)動(dòng)的均勻度
union nut,雙端螺母
unit,單元；單位
unit(of measurement),（測(cè)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(zhì)量
unit step function,單位階躍函數(shù)
universal balancing machine,通用平衡機(jī)
universal gas chromatograph,通用氣相色譜儀
universal head loss coefficient,通用壓頭損失系數(shù)
universal testing machine,萬能試驗(yàn)機(jī)
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(biāo)準(zhǔn)電池
unsteady flow,不穩(wěn)定流
upper-air observation,高空觀測(cè)
upper limit of the nominal of use for frequency,標(biāo)稱使用頻率范圍上限
173
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(nèi)壓傳感器
usable cross-section of the test channel,試驗(yàn)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(diào)整
user layer,用戶層
utility routine,服務(wù)程序；實(shí)用程序；實(shí)用例行程序
utility software,實(shí)用軟件
UV dosimeter,紫外線表
UVW anemometer,三維風(fēng)速表；UVW 風(fēng)速表
underwater television camera,水下電視攝像機(jī)
underwater towed system,水下拖曳系統(tǒng)
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(yùn)載工具
underwater visibility,水下能見度
underwater window,水下"窗口"
undetermined components,非測(cè)組分
unearthed voltage transformer,不接地型電壓互感器
uniaxial strain gauge,單軸應(yīng)變計(jì)
uniform stability,一致穩(wěn)定性
uniform temperature zone,均溫區(qū)
uniform temperature zone length,均熱帶長度
uniformity of table motion,臺(tái)面運(yùn)動(dòng)的均勻度
union nut,雙端螺母
unit,單元；單位
unit(of measurement),（測(cè)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(zhì)量
unit step function,單位階躍函數(shù)
universal balancing machine,通用平衡機(jī)
universal gas chromatograph,通用氣相色譜儀
universal head loss coefficient,通用壓頭損失系數(shù)
universal testing machine,萬能試驗(yàn)機(jī)
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(biāo)準(zhǔn)電池
unsteady flow,不穩(wěn)定流
upper-air observation,高空觀測(cè)
upper limit of the nominal of use for frequency,標(biāo)稱使用頻率范圍上限
173
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(nèi)壓傳感器
usable cross-section of the test channel,試驗(yàn)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(diào)整
user layer,用戶層
utility routine,服務(wù)程序；實(shí)用程序；實(shí)用例行程序
utility software,實(shí)用軟件
UV dosimeter,紫外線表
UVW anemometer,三維風(fēng)速表；UVW 風(fēng)速表