- precooling rate
- precooling room
- precooling section
- precooling store
- precooling technique
- precooling temperature
- precooling time
- precooling tunnel
- precooling zone
- precritical
- precompression
- predetermined conditions
- predetermined control
- predetermined superheat
- prediction
- prefactor
- preferred direction
- prefix-34 call
- prefix-35 call
- prepayment meter
- preponderant
- prequantum ideas
- prescribed limit
- preset
- preset superheat
- pressed switch
- pressure control
- pressure cooling
- pressure defrosting
- pressure front
- pressure manifold
- pressure microphone
- pressure pump
- pressure rise
- pressure transducer
- pressure vessel
- preventive reactor
- primary airstream
- primary coolant
- primary drying
- primary fluid
- primary particle
- primary rainbow
- predisruptive phenomena
- predrying
- preferential scattering
- preferred orientation
- prefilter zone
- prefix-36 call
- prefocus lamp
- preformed winding
- prefreeze
- prefreezing
- preheat
- preliminary cooler
- preliminary freezing
- premature release
- presbyopia
- prescribed speed
- preselector switch
- preset temperature
- pressure cable
- pressure monitor
- pressure reducer
- pressure switch
- pressurized air
- preventive resistor
- preview bus
- primary
- primary beam
- primary ejector
- primary phase
- principal law
- prism spectroscope
- prewarmed
- primary air
- primary battery
- primary evaporator
- primary fault
- primary filter
- primary refrigerant
- principal mode
- prism spectrograph
- probability factor
- probable error
- probe coil
- probe microphone
- process automation
- process computer
- process cooling
- process identification
- producer
- product particle
- pressurized vapour
- prestellar
- primary access
- primary carbide
- primary condenser
- primary distribution
- primary element