缓冲表面?    padded surface

纸质空气滤 清器?    paper air clearner

纸带记录器?    paper tape recorder

部分负荷?    part load

负荷特性?    part throttle characteristics

部分流式烟度计?    part-flow smokemeter

部分流取样法?    partial flow sampling

微粒物捕集装置?    particulate trap system

捕集装置氧化器    particulate trap system

微粒物?    particulated matter

氧干扰    parts per million carbon (ppmC)

百万分率碳?    parts per million carbon (ppmC)

轿车?    passenger car

客用道路列车?    passenger road train

车辆自重    payload

载重量?    payload

阀?    PCV valve

烟室    peak hold device

峰值储存器?    peak hold device

峰值喷油压力?    peak injection pressure

峰值喷油扭矩?    peak injection torque

药片?    pellet (pill,tablet)

颗粒式载体?    pelleted substrate

转化效率    pelleted substrate

骨盆?    pelvis

摆式碰撞器?    pendulum impactor

性能?    performance

换算系数?    performance test

性能试验?    performance test

垂直的?    perpendicular

光化学活性碳氢化合物?    photochemically reactive hydrocarbons

光电屏障?    photoelectric barrier

摄像标志?    photographic marks

人眼的感光曲线?    photoptic curve of human eye

光谱反应曲线    photoptic curve of human eye

烟度计物理反应时间?    physical response time of opacimeter

小型货车?    pick-up

引燃喷射?    pilot injection

轴针式喷嘴?    pintle type nozzle

活塞?    piston

活塞顶内燃烧室?    piston chamber

活塞顶部?    piston head