path unit,通路單元

pattern,探傷圖形

pattern coefficient,圖型系數

pattern recognition,模式識別

peak,峰

peak area,峰面積

peak base,峰底

peak detector,峰值檢波器

peak distortion,譜峰畸變

peak energy,峰能量

peak height,峰高

peak identification,譜峰鑒別

peak matching,峰匹配

peak of noise,噪聲高度

peak overlap,譜峰重疊

peak point,峰頂（點）

peak separation,峰距

peak shape factor,峰形系數

peak sound pressure,峰值聲壓

peak stripping,譜峰剝离

peak temperature,峰溫度

peak time,峰值時間

peak-to-peak value,峰峰值

peak-to-peak value of displacement,峰-峰值位移

peak (top) flatness,峰頂平直度

peak transmittance,峰值透過率

peak value,峰值

peak value of humidity,濕度峰值

peak value of temperature,溫度峰值

peak voltmeter,峰值電壓表

peak wavelength,峰值波長

peak width,峰寬

peak width at half height,半高峰寬

Peltier coefficient,珀爾帖系數

Peltier heat,珀爾帖熱

pen,墨水筆

pen recorder,筆式記錄儀

pen rising mechanism,抬筆机构

pendulum impact testing machine,擺錘式衝擊試驗机

pendulum meter,擺儀

pendulum striking edge,擺錘衝擊刀刃

penetrameter,透度計；像質計

penetrant inspection unit,滲透液清洗劑

penetrant testing method,滲透探傷法

penetrants,滲透液

Penning gauge,冷陰极電离規；潘宁規

percentage of theoretical slope (PTS),百分理論斜率

performance,性能

performance characteristics,性能特性

performance evaluation,性能指標

periodic and random deviations(PARD),周期和隨机偏差

periodic damping,周期阻尼；欠阻尼

periodic test,定期試驗

periodic vibration,周期振動

periodic waves marker,周期波時標

peripheral control unit,外圍設備控制器

peripheral equipment,外圍設備

peripheral flow-rate,周緣流量

peripheral interface adapter(PIA),外圍接口适配器

peripheral transfer,外圍傳送

peristaltic multi-channel pump,多通道蠕動泵

permanent flow-rate,常設流量

permanent-magnet-coil instrument,永磁動圈式[磁電系]儀表

permanent magnetic lens,永磁透鏡

permanent-magnet movingcoil galvanometer,永磁動圈式[磁電系]檢流計[振動子]

permeability,滲透率

permeability tube,滲透管

permeameter,磁導計

permissible cumulative discharge of standard cell,標准電池允許累計放電量

permissible discharge of standard cell,標准電池允許放電量

persistent wave NMR spectroscope,邊疆波核磁共振波譜儀

personal error,人為誤差

petroleum oil detection buoy system,石油探測浮標系統

pH electrode assembly,pH复合電极

pH meter,pH計

pH transducer [sensor],pH傳感器

pH value,pH值

phase,相

phase analysis,相位分析

phase angle,相角

phase angle stabilization,相角穩定

phase contrast,位相襯度

phase controlled circuit breaker,斷電相位控制器

phase datum mark,相位基准標記

phase detection,相位檢測

phase detector,鑒相器

phase difference,相位差

phase difference torque transducer,相位差式轉矩傳感器

phase displacement,相位差；角誤差

plase distance meter,相位式測距儀

phase indicator,相位指示器

phase lage,相位滯后

phase lead,相位超前

phase locus,相軌跡

phase margin,相位裕度

phase measurement,相位的測量

phase meter,相位表

phase modulation (PM),相位調制；調相