periodic and random deviations(PARD),周期和随机偏差
periodic damping,周期阻尼；欠阻尼
periodic test,定期试验
periodic vibration,周期振动
periodic waves marker,周期波时标
peripheral control unit,外围设备控制器
peripheral equipment,外围设备
peripheral flow-rate,周缘流量
peripheral interface adapter(PIA),外围接口适配器
peripheral transfer,外围传送
peristaltic multi-channel pump,多通道蠕动泵
permanent flow-rate,常设流量
permanent-magnet-coil instrument,永磁动圈式[磁电系]仪表
permanent magnetic lens,永磁透镜
permanent-magnet movingcoil galvanometer,永磁动圈式[磁电系]检流计[振动子]
permeability,渗透率
permeability tube,渗透管
permeameter,磁导计
permissible cumulative discharge of standard cell,标准电池允许累计放电量
permissible discharge of standard cell,标准电池允许放电量
persistent wave NMR spectroscope,边疆波核磁共振波谱仪
personal error,人为误差
petroleum oil detection buoy system,石油探测浮标系统
pH electrode assembly,pH复合电极
pH meter,pH计
pH transducer [sensor],pH传感器
pH value,pH值
phase,相
phase analysis,相位分析
phase angle,相角
phase angle stabilization,相角稳定
phase contrast,位相衬度
phase controlled circuit breaker,断电相位控制器
phase datum mark,相位基准标记
phase detection,相位检测
phase detector,鉴相器
phase difference,相位差
phase difference torque transducer,相位差式转矩传感器
phase displacement,相位差；角误差
plase distance meter,相位式测距仪
phase indicator,相位指示器
phase lage,相位滞后
phase lead,相位超前
phase locus,相轨迹
phase margin,相位裕度
phase measurement,相位的测量
phase meter,相位表
phase modulation (PM),相位调制；调相
phase of unbalance,不平衡相位
phase plane,相平面
phase plane portrait,相平面图
phase ratio,相比率
phase reference generator,参考相位发生器
phase response,相位响应
phase sensitive detector,相敏检波器
phase sequence indicator,相序指示器
phase space,相空间
phase trajectory,相轨迹
phase transition,相变
phase variable,相变量
phase-continuous FSK,相位连续FSK
phase-crossover frequency,相位交越频率
phase-frequency characteristics,相频特性
phase-shift ultrasonic flowmeter,相移式超声流量计
phon,方（响度级的单位）
phosphorescence,磷光
photo conduction tube,光导管
photo electron spectroscopy (PES),光电子能谱法
photo-electrical coded compass,光电码罗盘
photo-electrostatic display recorder,感光静电显示记录仪
photo ionization,光电离
photo resistor,光敏电阻器
photo-sensitive recorder,感光显示记录仪
photo sensor,光敏元件
photo-theodoliti,摄影经纬仪
photoacoustic spectrometry,光声光谱法
photoconductive transducer [sensor],光导式传感器
photoelectric colorimeter,光电比色法
photoelectric comparator,光电比较仪
photoelectric effect,光电效应
photoelectric fluxmeter,光电磁通表
photoelectric length meter,光电式长度计
photoelectric position detector,光电式位置检测器
photoelectric roll gap measuring instrument,光电式辊缝测量仪
photoelectric tachometer,光电式转速表
photoelectric tachometric transducer,光电式转速传感器
photoelectric thermometer,光电温度计
photoelectric transmissometer,光电透射仪
photoelectric width meter [gauge],光电式宽度计
photoelectro magnetic element,光电磁敏元件
photoionization detector (PID),光离子化检测器
photometer,光度计
photometric linearity,光度测量线性
photomultiplier,光电倍增管
phototheodilite,摄影经纬仪；照相经纬仪
phototube,光电管
photovoltaic cell,光电池
photovoltaic transducer [sensor],光伏式传感器
physical layer (PL),物理层
physical model,物理模型
physical modeling,物理建模
physical property type transducer [sensor],物性型传感器
physical quantity transducer [sensor],物理量传感器
physical similarity,物理相似
physical simulation,物理仿真
physical symbol system,物理符号系统
physiological quantity transducer [sensor],生理量传感器
picture spectrograph,图象摄谱仪
piezoelectric acceleration transducer,压电式加速度传感器
piezoelectric effect,压电效应
piezoelectric force transducer,压电式力传感器
piezoelectric microphone,压电传声器
piezoelectric pressure transducer,压电式压力传感器
piezoelectric transducer [sensor],压电式传感器；压电换能器
piezoelectric vibrator,压电振动器
piezoelectric vibrometer,压电式振动计
piezometer ring,均压环
piezo-resistance effect,压阻效应
piezoresistive acceleration transducer,压阻式加速度传感器
piezoresistive accelerometer,压阻式加速度计
piezoresistive effect,压阻效应
piezoresistive pressure transducer,压阻式压力传感器
piezoresistive transducer [sensor],压阻式传感器
piezoresistive vibrometer,压阻式振动计
piggy-back microbiological sampler,复背式微生物采集器
pilot,先导阀
pilot valve,指挥器
pilot balloon theodolite,测风经纬仪
pilot-operated regulator,指挥器操作型自力式调节阀
pilot-operated solenoid valve,先导型电磁阀
pin-cushion distortion,枕形畸变；正畸变
pinger,水声信标
pinion,轴齿轮
pink noise,粉红噪声
pipe prover,标准体积管；管式校准器
pipe reducer,异径接管
Pirani gauge,电阻规；皮拉尼规
Pirani vacuum gauge,皮拉尼真空计
piston,活塞
piston actuator,活塞执行机构
piston-cylinder assembly,活塞部件
piston gauge,活塞式压力计
piston gauge with equilibrium liquid,带平衡液柱活塞式压力计
piston gauge with re-entrant cylinder column,反压活塞式压力计