?动力冲程    power stroke

?电力输送线    power transmission line

?动力输送线,输电线    power transmission line

?动力操纵门    power-operated sliding door

?平面位置指示器    PPI (= plane position indicator)

?波兰验船协会    PR

?波兰验船协会    PR (= Polski Rejestr Statkow)

?平艏小艇    pram dinghy

?预组    preassembling

?沈淀试验    precipitation test

?预燃室    precombustion chamber

?预冷器    precooler

?预造    pre-erection

?预制    prefabrication

?预热器    preheater

?预热    preheating

?先期点火    preignition (or prema- ture ignition)

?先期点火    preignition (or premature ignition)

?预浸    preimpregnated

?初步设计    preliminary design

?[船厂]初步试    preliminary trial

?预浸材    pre-preg material

?旅客定额    prescribed number of passenger

?防腐剂    preservatives

?压机,冲床    press

?压力    pressure

?压力润滑器    pressure (or forced) lubricator

?压力水柜    pressure (or hydrophore) tank

?压力空气泵    pressure air pump

?压力角    pressure angle

?压力系数    pressure coefficient

?复压涡轮机    pressure compounded turbine

?压力容器    pressure container

?压力曲线    pressure curve

?压力降    pressure drop

?[加]压[过]滤器    pressure filter

?压力计,压力表    pressure gauge

?压力计    pressure gauge

?压力落差    pressure head

?压力壳(潜艇)    pressure hull

?压力计程仪    pressure log

?压力损失系数    pressure loss coefficient