opening valve time,开阀时间

operating conditions,工作条件

operating error,工作误差

operating infulence,工作条件影响

operating limits,极限工作条件

operating period,工作周期

operating pressure differential,工作压差

operating system (OS),操作系统

operating temperature range,工作温度范围

operating time,工作时间

operational amplifier,运算放大器

operational reliability,运行可靠性

operational research model,运筹学模型

operational unit,运算器

operations research,运筹学

operative limits,极限工作条件

operator,操作员

operator command,操作员命令

operator's console,操作员操纵台

operator's station,操作员站

optic fiber displacement meter,光纤式位移计

optic fiber position measuring instrument,光纤式位置测量仪

optic fiber pressure transducer,光纤压力传感器

optic fiber tachometer,光纤式转速表

optic fiber tachometric transducer,光纤式转速传感器

optical arm length,光臂长度

optical Doppler effect,光的多普勒效应

optical fiber,光导纤维

optical fiber chemical sensor,光纤化学传感器

optical fibre magnetometer,光纤磁强计

optical fiber sensor,光纤式传感器

optical(measurement)method,光测法

optical micrometer,光学测微器

optical plummet,垂准仪；光学对中器

optical pumping,magnetometer,光泵磁强计；光泵磁力仪

optical(quantity)transducer(sensor),光（学量）传感器

optical reading range,光学读数范围

optical spectrometer,光学光谱仪

optical system,光学系统

optical theodolite,光学经纬仪

optical vibrometer,光学测振仪

optical wedge micrometer,光楔测微器

optima estimation,最优估计

optimal control,最优控制

optimal control law,最优控制律

optimal control system,最优控制系统

optimal control theory,最优控制理论

optimal decision problem,最优决策问题

optimal solution,最优解

optimal strategy,最做出策略

optimality principle,最优性原理

optimization,（最）优化

optimization layer,优化层

optimization technique,最优化技术

optimum frequency,最佳频率

order,有序

order parameter,序参数

ordinary temperature thermistor,常温热敏电阻器

organic semiconductor gas transducer [sensor],有机半导体气体传感器

organic semiconductor humidity transduce [sensor],有机半导体湿度传感器

organic semiconductor thermistor,有机半导体热敏电阻器

orientation,定向

orientation control,定向控制

orifice,节流孔

orifice plate,孔板

orifice-and-plug flowmeter,锥塞式流量计

original system,原系统

originator,源发站

orthogonal distrortion,正交畸变

ortho-projector,正射投影仪

oscillating period,振荡周期

oscillator,振荡器

oscillograph,录（示）波器

oscillographic polarograph,示波极谱仪

oscilloscope,示波器

outboard rotor,外重心转子

outdoor location,户外场所

outer package,外包装

outlier,剔除值

output device,输出单元；输出设备

output equation,输出方程

output error,输出误差

output feedback,输出反馈

output fluctuation,输出波动

output force or torque stability,输出激振力或力矩的稳定性

output impedance,输出阻抗

output impedance of microphone,传声器输出阻抗

output information,输出信息

output matrix,输出矩阵

output noise,输出噪声

output prediction method,输出预估法

output shaft rotation clearance,输出轴间隙角

output shaft rotation range,输出轴转角范围

output shaft torque,输出轴转矩

output signal,输出信号

output signal "one" level,输出信号“1”电平

output signal "zero" level,输出信号“0”电平

output state,输出状态