attenuation,衰減

attenuation coefficient,衰減系數

attenuation length,衰減長度

attenuator,衰減器

attitude,姿態

attitude transducer[sensor],姿態傳感器

audio monitor,監听器

audio-frequency spectrometer,聲頻頻譜儀

audit,審核

Auger electron energy spectrometer(AEES),俄歇電子能譜儀

Auger electron image,俄歇電子象

Auger electron spectrometer,俄歇電子能譜儀

Auger electron spectroscopy(AES),俄歇電子能譜法

aurora,极光

auto-compensation logging instrument,電子自動測井儀

auto-compound current transformer,自耦式混合繞組電流互感器

auto-polarization compensator,自動极化補償器

autocorrelation function,自相關函數

automatic a.c.,d.c.B-H curve tracer,交﹛直流磁特性自動記錄裝置

automatic balancing machine,自動平衡机

automatic control,自動控制

automatic control souce of vacuum,真空自動控制電源

automatic control system,自動控制系統

automatic data processing,自動數据處理

automatic exposure device,自動曝光裝置

automatic feeder for brine,鹽水溶液自動補給器

automatic focus and stigmator,自動調焦和消象散裝置

automatic level,自動安平水准儀

automatic levelling compensator,視軸安平補償器

automatic/manual station;A/M station,自動/手動操作器

automatic programming,自動程度設計

automatic radio wind wane and anemometer,無線電自動風向風速儀

automatic railway weigh bridge,電子軌道衡

automatic scanning,自動掃查

automatic spring pipette,自動彈簧式吸液管

automatic testing machine,自動試驗机

automatic titrator,自動滴定儀

automatic tracking,自動跟蹤

automatic vertical index,豎直度盤指標補償器

automatic weather station,自動气象站

automation,自動化

automaton,自動机

auxiliary attachment,輔件

auxiliary controller bus(ACB),輔助控制器總線

auxiliary crate controller,輔助机箱控制器

auxiliary devices,輔助裝置

auxiliary equipment(of potentiometer),(電位差計的）輔助設備

auxiliary gas,輔助气体

auxiliary output signal,輔助輸出信號

auxiliary storage,輔助存儲器

auxiliary terminal,輔助端

auxiliary type gravimeter,助動型重力儀

availability,可用性

available time,可用時間

average,平均值

average availability,平均可用度

average nominal characteristic,平均名義特性

average sound level,平均聲級

average value of contarmination,污染的平均值

average wind speed,平均風速

axial clearance,軸向間隙

axial current flow method,軸向通電法

axial load,軸向載荷

axial sensitivity,軸向靈敏度

axial vibration,軸向振動

axis of rotation,擺軸；旋轉軸

axix of strain gauge,應變計[片]軸線

B-scope,B型顯示

back flushing,反吹

background,后台，背景，本底

background current,基流

background mass spectrum,本底質譜

background noise,背景噪聲

background processing,后台處理

background program,后台程度

Backman thermometer,貝克曼溫度計

backscattered electron image,背散射電子象

backward channel,反向信道

baffle wall,隔板

balance,天平

balance for measuring amount of precipitation,水量秤

balance output,對稱輸出

balance quality of rotor,轉子平衡精度

balance wieght,平衡塊

balanced plug,平衡型閥芯

balancing,平衡

balancing machine sensitivity,平衡机靈敏度

balancing machine,平衡机

balancing speed,平衡轉速

ball pneumatic dead wieght tester,浮球壓力計

ball screw assembly,滾珠絲杠副

ball valve,球閥

ballistic galvanometer,衝擊栓流計

band,頻帶

bandwidth,帶寬

band width of video amplifier,視頻放大器頻寬

bar primary bushing type current transformer,棒形電流互感器

barograph,气壓計