acoustic emission transducer[sensor],聲發射換能器

acoustic fatigue,聲疲勞

acoustic impedance,聲阻抗

acoustic logging instrument,聲波測井儀

acoustic malfunction,聲失效

acoustic matching layer,聲匹配層

acoustic(quantity)transducer[sensor],聲（學量）傳感器

acoustic ratio,聲比

acoustic releaser,聲釋放器

acoustic resistance,聲阻

acoustic thermometer,聲學溫度計；聲波溫度表

acoustic tide gauge,回聲驗潮儀

acoustic transponder,聲應答器

acoustical frequency electric,聲頻大地電場儀

acoustical hologram,聲全息圖

acoustical holography,聲全息

acoustical holography by electron-beam scanning,電子束掃描聲全息

acoustical holography by laser scanning,激光束掃描聲全息

acoustical holography by mechanical scanning,机械掃查聲全息

acoustical imaging by Bragg diffraction,布拉格衍射聲成像

acoustical impedance method,聲阻法

acoustical lens,聲透鏡

acoustically transparent pressure vessel,透聲壓力容器

acquisition time,取數据時間

actinometer,光能計；直接日射強度表；日射表

(active)energy meter,（有功）電度表

active gauge length,有效基長

active gauge width,有效基寬

active metal indicated electrode,活性金屬指示電极

active remote sensing,主動遙感

active transducer[sensor],有源傳感器

activity,活度 activity coefficient,活度系數

actual material calibration,實物校准

actual time of observation,實際觀測時間

actual transformation ratio of voltage transformer,電壓互感器的實際變化

actral transformation ratio of current transformer,電流互感器的實際變化

actual value,實際值

actual voltage ratio,實際電壓比

actuator,執行机构；驅動器

actuator bellows,執行机构波紋管

actuator load,執行机构負載

actuator power unit,執行机构動力部件

actuator sensor interface(ASI),執行器傳感器接口

actuator shaft,執行机构輸出軸

actuator spring,執行机构彈簧

actuator stem,執行机构輸出杆

actuator stem force,執行机构剛度

actuator travel characteristic,執行机构行程特性

adaptation layer,适應層

adaptive control,（自）适應控制

adaptive control system,适應控制系統

adaptive controller,适應控制器

adaptive prediction,适應預報

adaptive telemetering system,适應遙測系統

adder,加法器

addition method,疊加法

additional correction,補充修正

additivity of mass spectra,質譜的可迭加性

address,地址 adiabatic calorimeter,絕熱式熱量計

adjust buffer total ion strength,總离子強度調節緩衝劑

adjustable cistern barometer,動槽水銀气壓表

adjustable relative humidity range,相對濕度可調范圍

adjustable temperature range,溫度可調范圍

adjusted retention time,調整保留時間

adjusted retention volume,調整保留体積

adjuster,調整机构；調節器

adjustment,調整

adjustment bellows,調節波紋管

adjustment device,調整裝置

adjusting pin,校正針

adsorbent,吸附劑

adsorption chromatography,吸附色譜法

aerial camera,航空照相机

aerial remote sensing,航空遙感

aerial surveying camera,航攝儀

aerodynamic balance,空气動力學天平

aerodynamic noise,气体動力噪聲

aerograph,高空气象計

aerogravity survey,航空重力測量

aerometeorograph,高空气象計

aerosol,縣浮微料；气溶膠

aging of column,柱老化

agitator,攪拌器

agricultural analyzer,農用分析儀

air-borne gravimeter,航空重力儀

air capacitor,空气電容器

air consumption,耗气量

air damper,空气阻尼器

air-deployable buoy,空投式极地浮標

air-drop automatic station,空投自動气象站

air duct,風道

air gun,空气槍

air inlet,進風口

air lock,气鎖閥

air-lock device,鎖气裝置

air outlet,回風口

air pressrue balance,空气壓力天平

air pressure test,空气壓力試驗