﹛﹛long distance water level recorder,遙測水位計
long period seismograph,長周期地震儀
long-radius nozzle,長徑噴嘴
long term running test,長期運轉試驗
longitudinal magnetization,縱向磁化
longitudinal magnetizing ampere turn,縱向磁化安匝數
longitudinal resolution,縱向分辨力 l
ongitudinal wave,縱波
longitudinal wave probe,縱波探頭
longitudinal wave technique,縱波法
look-at-me(LAM),請求注意
look-at-me line,請求注意線；L線
look-at-me request,LAM要求]
look-at-me signal,請求注意信號；L信號
loop galanometer,回線式振動子
loopback checking,回送檢驗
loudenss contours,等響曲線
ludness,響度
loudness level,響度极
low altitude sonde,低空探空儀
low cost autonation,低成本自動化
low e.m.f.potentiometer,低電位電位差時
low electron energy diffractometer(LEED),低能電子衍射儀
low frequency fatigue testing machine,低頻疲勞試驗机
low limiting control,下限控制
low noise valve,低噪聲閥
low-recovery valve,低壓力恢复閥
low speed balancing,低速平衡
low-speed magneto synchronous motor,永磁式低速同步電動机
low temperature humidity chamber,低溫恒溫恒濕箱
low temperature strain gauge,低溫應變計
low temperature test,低溫試驗
low-temperature test chamber,低溫試驗箱
low temperature testing machine,低溫試驗机
low temperature thermistor,低溫熱敏電阻器
low-temperature treatment,低溫處理
low tension loop,低壓回路
low voltage terminal,低壓端
low water,低潮
lower actual measuring range value,實際測量范圍下限值
lubricator,注油器
luminance transducer[sensor],亮度傳感器
luminous flux,光通量
luminous intensity,發光強度
lysimeter,滲水測定器
MA-scope,MA型顯示
Mach number,馬赫數
machine code,机器代碼
machine intelligence,机器智能
machine language,机器語言
machine type rock ore densimeter,机械式岩礦密度儀
macro analysis,常量分析
macro instruction,宏指令
macro-economic model,宏觀經濟模型
macro-economic system,宏觀經濟系統
macroassembly language,宏匯編語言
magnet,磁鐵
magnet assembly,磁体
magnet dynamic instrument,磁式動態儀器
magnetic analyzer,磁分析器
magnetic balance,磁秤
magnetic card,磁卡
magnetic core,磁心
magnetic damper,磁性阻尼器
magnetic deflection,磁偏轉
magnetic detector for lightning currents,閃電電流磁檢示器
magnetic disc,磁盤
magnetic domain attachment,磁疇附件
magnetic drum,磁鼓
magnetic field,磁場
magnetic field meter,磁場計
magnetic field strength transducer[sensor],磁場強度傳感器
magnetic flaw detection ink,磁懸液
magnetic flow transducer,磁性流量傳感器
magnetic flux transducer[sensor],磁通傳感器
magnetic grating displacement transducer,磁柵式位移傳感器
magnetic induced polariaxtion instrument,磁激電儀
magnetic locator,磁定位器
magnetic logger,磁測井儀
magnetic oxygen transducer[sensor],磁式氧傳感器
magnetic particle,磁粉
magnetic particle inspection,磁粉探傷机 magnetic potentiometer,磁位計
magnetic prospecting instrument,磁法勘探儀器
magnetic(quantity)transducer[sensor],磁（學量）傳感器
magnetic resistivity instrument,磁電阻率儀
magnetic resistor,磁敏電阻器
magnetic rotaion comparison,磁旋比
magnetic scale width meter[gauge],磁柵式寬度計
magnetic screen[shield],磁屏蔽
magnetic sensor,磁傳感器
magnetic separator,磁性分選儀
magnetic storage,磁存儲器
magnetic susceptibility logger,磁化率測井儀
magnetic tape,磁帶
magnetic tape unit,磁帶机
magnetic widn,磁風
magnetization method,磁化方法
magnetizer,充磁机
magnetizing,磁化
magnetizing assembly,磁化裝置
