затвор, розташований нижче рівня патронника
breech chamber
blow-back breech block
breech block
breech-block carrier
breech-block crank
breech-block detent
wedge-type breech-block
vertical sliding breech-block system
face of breech block
echelon corps and below (ECB)
Force Battle Command Brigade-and-Below (FBCB2)
get below ground
below minima weather
the weather below minima
cylinder block (engine block)
feed block slide (feed-block-actuating slide)
depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance
breech
breech face
breech mechanism
breech ring (of firearm)
breech screw
breech-loading gun
lever breech mechanism (LBM)
breech loaded
breech piece socket
breech boresight
closed-breech scavenger system
breech and barrel assy
breech assembly
breech blast
breech carrier plate