N
n-exponent,n-指數(shù)
N.T.C.thermistor,負(fù)溫度系數(shù)熱敏電阻器
Nansen bottle,南森采水器
Nansen opening-and-closing net,南森開團(tuán)式網(wǎng)
narrow-band filter,窄帶濾波器
narrow-band random vibration,窄帶隨機(jī)振動(dòng)
narrow band spectrum,窄波段
national satellite,國土衛(wèi)星
national standard,國家標(biāo)準(zhǔn)
natural convection,自然對流
natural electric-field method instrument,自然電場法儀器
natural environment,自然環(huán)境
natural field electro-detector,天然場電測儀
natural frequency,固有頻率
natural frequency measurement,固有頻率的測量
natural frequency of rotor/bearing system,轉(zhuǎn)子支承系統(tǒng)固有頻率
natural gamma spectromenter of logger,自然伽瑪能譜測井儀
natural inherent frequency,自然固有頻率
natural mode of vibration,固有振型
near field,近場
near infrared range(NIR)remote sensing,近紅外遙感
near-optimality,近優(yōu)性
nearest-neighbor,最近鄰
nebulizer,霧化器
negative feedback,負(fù)反饋
negative knives linear,負(fù)刀聯(lián)線
negative pressure,負(fù)壓；真空
negative shock response spectrum,負(fù)沖擊響應(yīng)譜
negative strain,負(fù)應(yīng)變
negative tempperature coefficient thermistor,負(fù)溫度系數(shù)熱敏電阻
nephelometer,渾濁度表
nephoscope,測云器
Nernst equation,能斯特方程
nest,嵌套
net pyrgeometer,凈地球輻射表
net pyrradiometer,輻射平衡表
net radiation,凈輻射；輻射平衡；輻射差額
net retention time,凈保留時(shí)間
net retention volume,凈保留體積
net sounder,網(wǎng)位儀
net terrestrial radiation,凈地球輻射
network frame,網(wǎng)絡(luò)幀
network management,網(wǎng)絡(luò)管理
network model,網(wǎng)絡(luò)模型
network protocol,網(wǎng)絡(luò)協(xié)議
network technique,網(wǎng)絡(luò)技術(shù)
neutral absorption,中性吸收
neutral filter,中性濾光片
neutral zone,中間區(qū)
neutrally buoyant float,中性浮標(biāo)
Newton's fluid,牛頓流體
neutron dosimeter,牛頓流動(dòng)定律
neutron dosimeter,中子劑量計(jì)
neutron logging instrument,中子測井儀
neutron fraiograghy,中子射線照相術(shù)
neutron spectromenter,中子能譜儀
neutron-gamma radiometer,中子伽瑪輻射儀
Nickel-Chromium/CopperNickel thermocouple,鎳鉻-銅鎳熱電偶
Nickel-Chromium/NickelAluminium[Silicom] thermocouple，鎳鉻-鎳鋁[硅]熱電偶
Nickel-Chromium-Silicom/Nickel-Silicom thermocouple,鎳鉻硅鎳硅熱電偶
Nier-Johnson geometry mass spectrometer,尼爾-約翰遜型 雙聚焦質(zhì)譜計(jì)
NIM bin NIM,機(jī)箱
Niskin sterile water sampler,尼斯金無菌采水器
nitrile rubber(Buna N),丁晴橡膠
nitrogen dioxide trnsfer furnace,二氧化氮轉(zhuǎn)化爐
nitrogen-oxide analyzer,氮氧化物分析儀
NMR absorption band,核磁共振吸收帶
NMR absorption line,核磁共振吸收線
NMR equipment,核磁共振儀
NMR line width,核磁共振線寬
no-load,空負(fù)荷
no-load test,空載試驗(yàn)
node,節(jié)點(diǎn)
noetic science,思維科學(xué)
noise,噪聲
noise dose,噪聲劑量
noise dose meter,噪聲劑量計(jì)
noise factor,噪聲系數(shù)
noise generator,噪聲發(fā)生器
noise level,噪聲電平
noise level analyzer,噪聲級分析儀
noise prediction,噪聲預(yù)估
noise room,噪聲室
noise suppressing varistor,消噪電壓敏電阻器
noise thermometer,噪聲溫度計(jì)
noise transducer [sensor],噪聲傳感器
nominal cartridge diameter of microphone,傳聲器極頭公稱直徑
nominal characteristic,名義特性
nominal flow-rate,公稱流量
nominal heat value,標(biāo)定熱值
nominal humidity,標(biāo)稱濕度
nominal operating condition,正常工作條件
nominal pressure rating,公稱壓力
nominal range,標(biāo)稱使用范圍；標(biāo)稱量限
nominal range of use,標(biāo)稱使用范圍
nominal size,公稱通徑
nominal temperature,標(biāo)稱溫度
nominal travel,標(biāo)稱行程
nominal value,標(biāo)稱值
nominal voltage ratio,標(biāo)稱電壓比
non-conformity,不合格
non-contact thermometry,非接觸測溫法
non-crystalline electrode,非晶體電極
non-delimiter byte,非定界字節(jié)
non-destructive inspection,無損探傷
non-destructive inspection machine,無損探傷機(jī)
non-dimensional [relative] velocity,無量綱[相對]速度
non-dispersive infra-red gas analyzer;NDIR gas analyzer,非色散紅外線氣體分析器；NDIR氣體分析器
non-engineering system simulation,非工程系統(tǒng)仿真
non-enveloped thermistor,非密封型熱敏電阻器
non-function type optic-fibre temperature transducer,非功能型光纖溫度傳感器
non-interacting control,無相關(guān)控制
non-interchangeable accessory,不可互換附件
non-isolated analogue input,非隔離的模擬輸入
non-line conversion,非線性轉(zhuǎn)換
non-linear damping,非線性阻尼
non-magnetic strain gauge,抗磁性應(yīng)變計(jì)
non-Newtonian fluid,非牛頓流體
non-radioactive electron capture detector,無放射源電子捕獲檢測器
non-reference line imaginary real amplitude receiver,無參考線虛分量儀
non-relevant failure,非關(guān)聯(lián)失效
non return magnetometer,無定向磁力儀
non rotational imaging,無旋轉(zhuǎn)成象
non-selective radiator,非選擇輻射體
non split stream injector,無分流進(jìn)樣器
non-uniformity of chart [paper] speed,紙速不均勻性
non-uniqueness,非性
noncapacitive a.c.arc,非電容性交流電弧
nondeterminisitic control system,非確定性控制系統(tǒng)
nondeterministic model,非確定性模型
nondiffraction X-ray spectrometer,非衍射X射線光譜儀
nonequilibrium state,非平衡態(tài)
nonequilibrium system,非均衡系統(tǒng)
nonlinear characteristics,非線性特性
nonlinear control system,非線性控制系統(tǒng)
nonlinear control system theory,非線性控制系統(tǒng)理論
nonlinear estimation,非線性估計(jì)
nonlinear model,非線性模型
nonlinear prediction,非線性預(yù)報(bào)
nonlinear programming,非線性規(guī)劃
nonlinear scale,非線性標(biāo)度
nonlinear system simulation,非線性系統(tǒng)仿真
nonlinear vibration,非線性振動(dòng)
nonlinear viscous damping,非線性粘性阻尼
nonlinearity,非線性
nonmetallic material testing machine,非金屬材料試驗(yàn)機(jī)
nonreturn-to-zero (NRZ),不歸零制
normal barometer,標(biāo)準(zhǔn)氣壓表
normal beam technique,垂直法
normal beam testing,垂直法
normal calomel electrode,當(dāng)量甘汞電極
normal distribution,正態(tài)分布
normal flow rate,正常流量
normal modes,正態(tài)振型
normal operating conditions,正常工作條件
normal-phase liquid chromatography,正相液相色譜法
normal probe,直探頭
normal station,普通站
normal stress,正應(yīng)力
normal temperature strain gauge,常溫應(yīng)變計(jì)
normal thermometer,標(biāo)準(zhǔn)溫度表
normalization method,歸一法
normalization regulator,歸一化調(diào)節(jié)器
normalized impedance,歸一化阻抗
normalized mass spectrum,歸一化質(zhì)譜
normalized reactance,歸一化電抗
normalized resistance,歸一化電阻
normally closed solenoid valve,常關(guān)式電磁閥
normally open solenoid valve,常開式電磁閥
notch filter,節(jié)點(diǎn)濾波器
nozzle,噴嘴
n-th nodal unbalance,第n階振型不平衡諧量
N-type oxide gas sensor,N型氧化物氣敏元件
nuclear electric quadrupole moment resonance spectroscopy,核四極共振波譜法
Nuclear Instrument Module (NIM),核儀器模塊
nuclear magnetic double resonance,核磁雙共振（法）
nuclear magnetic resonance magnetometer,核磁共振磁強(qiáng)計(jì)
nuclear magnetic resonance spectroscopy;NMR spectroscopy,核磁共振波譜法
nuclear radiation thickness meter,核輻射厚度計(jì)
(nuclear)radiation transducer [sensor],（核）輻射式傳感器
nuclei counter,計(jì)核器
nude source,*式離子源
null measurement,指零測量
null method,零位法
null method of measurement,零位測量法；指零測量法；零差測量法
null reading method,零讀法
number of degrees of freedom,自由度數(shù)
number of effective plate,有效板數(shù)
number of theoretical plate,理論板數(shù)
numeric key,數(shù)字鍵
numerical aperture (NA),數(shù)值孔徑
numerical control,數(shù)值控制
numerical value (of a quantity),（量的）數(shù)值
nutating disc flowmeter,（章動(dòng)）圓盤流量計(jì)
nutating flowmeter,章動(dòng)流量計(jì)
nutrients,營養(yǎng)鹽
nutrients analyzer for seawater,海水營養(yǎng)鹽分析器
Nyquist plot,奈奎斯特圖
n-exponent,n-指數(shù)
N.T.C.thermistor,負(fù)溫度系數(shù)熱敏電阻器
Nansen bottle,南森采水器
Nansen opening-and-closing net,南森開團(tuán)式網(wǎng)
narrow-band filter,窄帶濾波器
narrow-band random vibration,窄帶隨機(jī)振動(dòng)
narrow band spectrum,窄波段
national satellite,國土衛(wèi)星
national standard,國家標(biāo)準(zhǔn)
natural convection,自然對流
natural electric-field method instrument,自然電場法儀器
natural environment,自然環(huán)境
natural field electro-detector,天然場電測儀
natural frequency,固有頻率
natural frequency measurement,固有頻率的測量
natural frequency of rotor/bearing system,轉(zhuǎn)子支承系統(tǒng)固有頻率
natural gamma spectromenter of logger,自然伽瑪能譜測井儀
natural inherent frequency,自然固有頻率
natural mode of vibration,固有振型
near field,近場
near infrared range(NIR)remote sensing,近紅外遙感
near-optimality,近優(yōu)性
nearest-neighbor,最近鄰
nebulizer,霧化器
negative feedback,負(fù)反饋
negative knives linear,負(fù)刀聯(lián)線
negative pressure,負(fù)壓；真空
negative shock response spectrum,負(fù)沖擊響應(yīng)譜
negative strain,負(fù)應(yīng)變
negative tempperature coefficient thermistor,負(fù)溫度系數(shù)熱敏電阻
nephelometer,渾濁度表
nephoscope,測云器
Nernst equation,能斯特方程
nest,嵌套
net pyrgeometer,凈地球輻射表
net pyrradiometer,輻射平衡表
net radiation,凈輻射；輻射平衡；輻射差額
net retention time,凈保留時(shí)間
net retention volume,凈保留體積
net sounder,網(wǎng)位儀
net terrestrial radiation,凈地球輻射
network frame,網(wǎng)絡(luò)幀
network management,網(wǎng)絡(luò)管理
network model,網(wǎng)絡(luò)模型
network protocol,網(wǎng)絡(luò)協(xié)議
network technique,網(wǎng)絡(luò)技術(shù)
neutral absorption,中性吸收
neutral filter,中性濾光片
neutral zone,中間區(qū)
neutrally buoyant float,中性浮標(biāo)
Newton's fluid,牛頓流體
neutron dosimeter,牛頓流動(dòng)定律
neutron dosimeter,中子劑量計(jì)
neutron logging instrument,中子測井儀
neutron fraiograghy,中子射線照相術(shù)
neutron spectromenter,中子能譜儀
neutron-gamma radiometer,中子伽瑪輻射儀
Nickel-Chromium/CopperNickel thermocouple,鎳鉻-銅鎳熱電偶
Nickel-Chromium/NickelAluminium[Silicom] thermocouple，鎳鉻-鎳鋁[硅]熱電偶
Nickel-Chromium-Silicom/Nickel-Silicom thermocouple,鎳鉻硅鎳硅熱電偶
Nier-Johnson geometry mass spectrometer,尼爾-約翰遜型 雙聚焦質(zhì)譜計(jì)
NIM bin NIM,機(jī)箱
Niskin sterile water sampler,尼斯金無菌采水器
nitrile rubber(Buna N),丁晴橡膠
nitrogen dioxide trnsfer furnace,二氧化氮轉(zhuǎn)化爐
nitrogen-oxide analyzer,氮氧化物分析儀
NMR absorption band,核磁共振吸收帶
NMR absorption line,核磁共振吸收線
NMR equipment,核磁共振儀
NMR line width,核磁共振線寬
no-load,空負(fù)荷
no-load test,空載試驗(yàn)
node,節(jié)點(diǎn)
noetic science,思維科學(xué)
noise,噪聲
noise dose,噪聲劑量
noise dose meter,噪聲劑量計(jì)
noise factor,噪聲系數(shù)
noise generator,噪聲發(fā)生器
noise level,噪聲電平
noise level analyzer,噪聲級分析儀
noise prediction,噪聲預(yù)估
noise room,噪聲室
noise suppressing varistor,消噪電壓敏電阻器
noise thermometer,噪聲溫度計(jì)
noise transducer [sensor],噪聲傳感器
nominal cartridge diameter of microphone,傳聲器極頭公稱直徑
nominal characteristic,名義特性
nominal flow-rate,公稱流量
nominal heat value,標(biāo)定熱值
nominal humidity,標(biāo)稱濕度
nominal operating condition,正常工作條件
nominal pressure rating,公稱壓力
nominal range,標(biāo)稱使用范圍；標(biāo)稱量限
nominal range of use,標(biāo)稱使用范圍
nominal size,公稱通徑
nominal temperature,標(biāo)稱溫度
nominal travel,標(biāo)稱行程
nominal value,標(biāo)稱值
nominal voltage ratio,標(biāo)稱電壓比
non-conformity,不合格
non-contact thermometry,非接觸測溫法
non-crystalline electrode,非晶體電極
non-delimiter byte,非定界字節(jié)
non-destructive inspection,無損探傷
non-destructive inspection machine,無損探傷機(jī)
non-dimensional [relative] velocity,無量綱[相對]速度
non-dispersive infra-red gas analyzer;NDIR gas analyzer,非色散紅外線氣體分析器；NDIR氣體分析器
non-engineering system simulation,非工程系統(tǒng)仿真
non-enveloped thermistor,非密封型熱敏電阻器
non-function type optic-fibre temperature transducer,非功能型光纖溫度傳感器
non-interacting control,無相關(guān)控制
non-interchangeable accessory,不可互換附件
non-isolated analogue input,非隔離的模擬輸入
non-line conversion,非線性轉(zhuǎn)換
non-linear damping,非線性阻尼
non-magnetic strain gauge,抗磁性應(yīng)變計(jì)
non-Newtonian fluid,非牛頓流體
non-radioactive electron capture detector,無放射源電子捕獲檢測器
non-reference line imaginary real amplitude receiver,無參考線虛分量儀
non-relevant failure,非關(guān)聯(lián)失效
non return magnetometer,無定向磁力儀
non rotational imaging,無旋轉(zhuǎn)成象
non-selective radiator,非選擇輻射體
non split stream injector,無分流進(jìn)樣器
non-uniformity of chart [paper] speed,紙速不均勻性
non-uniqueness,非性
noncapacitive a.c.arc,非電容性交流電弧
nondeterminisitic control system,非確定性控制系統(tǒng)
nondeterministic model,非確定性模型
nondiffraction X-ray spectrometer,非衍射X射線光譜儀
nonequilibrium state,非平衡態(tài)
nonequilibrium system,非均衡系統(tǒng)
nonlinear characteristics,非線性特性
nonlinear control system,非線性控制系統(tǒng)
nonlinear control system theory,非線性控制系統(tǒng)理論
nonlinear estimation,非線性估計(jì)
nonlinear model,非線性模型
nonlinear prediction,非線性預(yù)報(bào)
nonlinear programming,非線性規(guī)劃
nonlinear scale,非線性標(biāo)度
nonlinear system simulation,非線性系統(tǒng)仿真
nonlinear vibration,非線性振動(dòng)
nonlinear viscous damping,非線性粘性阻尼
nonlinearity,非線性
nonmetallic material testing machine,非金屬材料試驗(yàn)機(jī)
nonreturn-to-zero (NRZ),不歸零制
normal barometer,標(biāo)準(zhǔn)氣壓表
normal beam technique,垂直法
normal beam testing,垂直法
normal calomel electrode,當(dāng)量甘汞電極
normal distribution,正態(tài)分布
normal flow rate,正常流量
normal modes,正態(tài)振型
normal operating conditions,正常工作條件
normal-phase liquid chromatography,正相液相色譜法
normal probe,直探頭
normal station,普通站
normal stress,正應(yīng)力
normal temperature strain gauge,常溫應(yīng)變計(jì)
normal thermometer,標(biāo)準(zhǔn)溫度表
normalization method,歸一法
normalization regulator,歸一化調(diào)節(jié)器
normalized impedance,歸一化阻抗
normalized mass spectrum,歸一化質(zhì)譜
normalized reactance,歸一化電抗
normalized resistance,歸一化電阻
normally closed solenoid valve,常關(guān)式電磁閥
normally open solenoid valve,常開式電磁閥
notch filter,節(jié)點(diǎn)濾波器
nozzle,噴嘴
n-th nodal unbalance,第n階振型不平衡諧量
N-type oxide gas sensor,N型氧化物氣敏元件
nuclear electric quadrupole moment resonance spectroscopy,核四極共振波譜法
Nuclear Instrument Module (NIM),核儀器模塊
nuclear magnetic double resonance,核磁雙共振（法）
nuclear magnetic resonance magnetometer,核磁共振磁強(qiáng)計(jì)
nuclear magnetic resonance spectroscopy;NMR spectroscopy,核磁共振波譜法
nuclear radiation thickness meter,核輻射厚度計(jì)
(nuclear)radiation transducer [sensor],（核）輻射式傳感器
nuclei counter,計(jì)核器
nude source,*式離子源
null measurement,指零測量
null method,零位法
null method of measurement,零位測量法；指零測量法；零差測量法
null reading method,零讀法
number of degrees of freedom,自由度數(shù)
number of effective plate,有效板數(shù)
number of theoretical plate,理論板數(shù)
numeric key,數(shù)字鍵
numerical aperture (NA),數(shù)值孔徑
numerical control,數(shù)值控制
numerical value (of a quantity),（量的）數(shù)值
nutating disc flowmeter,（章動(dòng)）圓盤流量計(jì)
nutating flowmeter,章動(dòng)流量計(jì)
nutrients,營養(yǎng)鹽
nutrients analyzer for seawater,海水營養(yǎng)鹽分析器
Nyquist plot,奈奎斯特圖