long period seismograph,长周期地震仪

long-radius nozzle,长径喷嘴

long term running test,长期运转试验

longitudinal magnetization,纵向磁化

longitudinal magnetizing ampere turn,纵向磁化安匝数

longitudinal resolution,纵向分辨力 l

ongitudinal wave,纵波

longitudinal wave probe,纵波探头

longitudinal wave technique,纵波法

look-at-me(LAM),请求注意

look-at-me line,请求注意线；L线

look-at-me request,LAM要求]

look-at-me signal,请求注意信号；L信号

loop galanometer,回线式振动子

loopback checking,回送检验

loudenss contours,等响曲线

ludness,响度

loudness level,响度极

low altitude sonde,低空探空仪

low cost autonation,低成本自动化

low e.m.f.potentiometer,低电位电位差时

low electron energy diffractometer(LEED),低能电子衍射仪

low frequency fatigue testing machine,低频疲劳试验机

low limiting control,下限控制

low noise valve,低噪声阀

low-recovery valve,低压力恢复阀

low speed balancing,低速平衡

low-speed magneto synchronous motor,永磁式低速同步电动机

low temperature humidity chamber,低温恒温恒湿箱

low temperature strain gauge,低温应变计

low temperature test,低温试验

low-temperature test chamber,低温试验箱

low temperature testing machine,低温试验机

low temperature thermistor,低温热敏电阻器

low-temperature treatment,低温处理

low tension loop,低压回路

low voltage terminal,低压端

low water,低潮

lower actual measuring range value,实际测量范围下限值

lubricator,注油器

luminance transducer[sensor],亮度传感器

luminous flux,光通量

luminous intensity,发光强度

lysimeter,渗水测定器

MA-scope,MA型显示

Mach number,马赫数

machine code,机器代码

machine intelligence,机器智能

machine language,机器语言

machine type rock ore densimeter,机械式岩矿密度仪

macro analysis,常量分析

macro instruction,宏指令

macro-economic model,宏观经济模型

macro-economic system,宏观经济系统

macroassembly language,宏汇编语言

magnet,磁铁

magnet assembly,磁体

magnet dynamic instrument,磁式动态仪器

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,磁偏转

magnetic detector for lightning currents,闪电电流磁检示器

magnetic disc,磁盘

magnetic domain attachment,磁畴附件

magnetic drum,磁鼓

magnetic field,磁场

magnetic field meter,磁场计

magnetic field strength transducer[sensor],磁场强度传感器

magnetic flaw detection ink,磁悬液

magnetic flow transducer,磁性流量传感器

magnetic flux transducer[sensor],磁通传感器

magnetic grating displacement transducer,磁栅式位移传感器

magnetic induced polariaxtion instrument,磁激电仪

magnetic locator,磁定位器

magnetic logger,磁测井仪

magnetic oxygen transducer[sensor],磁式氧传感器

magnetic particle,磁粉

magnetic particle inspection,磁粉探伤机 magnetic potentiometer,磁位计

magnetic prospecting instrument,磁法勘探仪器

magnetic(quantity)transducer[sensor],磁（学量）传感器

magnetic resistivity instrument,磁电阻率仪

magnetic resistor,磁敏电阻器

magnetic rotaion comparison,磁旋比

magnetic scale width meter[gauge],磁栅式宽度计

magnetic screen[shield],磁屏蔽

magnetic sensor,磁传感器

magnetic separator,磁性分选仪

magnetic storage,磁存储器

magnetic susceptibility logger,磁化率测井仪

magnetic tape,磁带

magnetic tape unit,磁带机

magnetic widn,磁风

magnetization method,磁化方法

magnetizer,充磁机

magnetizing,磁化