паз у тарілці клапана
penetrating head injury / open head injury
drop head body (drop-head body)
head-to-head flyoff
valve head deposits
valve-in-head motor
exhaust valve head
valve head
check valve / non-return valve
non-return valve / check valve
permanent slot
slot
slot-type groove
indexing slot
time slot
advance slot
cross slot
U slot of piston
ejection slot
end slot
extractor slot
half slot
guide slot
multi-slot muzzle brake
slot cooling
key slot
vision slot
terminal slot cover
longitudinal slot
longitudinal slot in broad face
longitudinal slot in narrow face
longitudinal-slot antenna array
longitudinal-slot array