MSME Master of Science in Mechanical Engineering 机械工程学硕士

MT Magnetic particle Test 磁粉探伤

MWD Measurement While Drilling 随钻测量

NA Neutral Axis 中性轴

NC National Coarse thread 美制粗牙螺纹

NCR Non Conformity Report 不合格报告

ND Nuclear Decay 核衰变

NM Newton Metre 牛顿·米

NMI New Model Introduction 新型(汽车)模型介绍

NO Normal output fluorescent light 一般输出萤光灯

NOS Nitrous Oxide System 氮气加速系统

NP Nonlinear Programming 非线性规划, 非线性程序设计

NR Noncoherent Rotation 非一致转动

OA Out of Action 停止射击，停止照射；发生故障

OAC oxygen arc cutting 氧气电弧切割

OAW Oxy-Acetylene Welding 氧乙炔焊

OC Oxygen Cutting 气割

OC-F flux cutting 熔剂切割

OC-P metal powder cutting 金属熔剂切割

OCS On-off Control System 开关量控制系统