powd - proc
- primary imperfections
- primary injector
- primary jet
- primary lance
- primary loop
- primary metal
- primary mill
- primary mixing building
- primary nozzle
- primary oxygen
- primary phase
- primary pipe
- primary recrystallization
- primary scale breaker
- primary screen
- primary shale
- primary slime
- primary steel
- primary vacuum
- primary xeroradiography
- primary-beam energy
- prime piling box
- prime plate
- prime product
- prime sheet
- prime sheet stacking station
- primer
- primer (gilding) brass
- primes
- primitive
- primitive axis
- primitive plane
- principal impurities
- principal lattice direction
- principal lines
- principal stress ratio
- principal weld
- prinsipal stress
- printing
- printing coat