бобишка з отвором для поршневого пальця в поршні
wrist-pin boss reinforcement
piston pin
bearing piston pin
full-floating piston pin
arming pin; safety pin
firing pin retaining pin
track pin retaining pin
belt-feed pawl pin / belt feed pawl pin
trunnion boss
boss eddy
boss vortex
air boss
ballistic offensive suppression system (BOSS)
ballistic optimizing shooting system (BOSS)
base operating supply system (BOSS)
broad ocean scoring system (BOSS)
Bureau of State Security (BOSS)
four-boss breaker cam
mini boss
mounting boss
support boss
bushing boss
gas piston
piston
short piston travel
recuperator piston
recuperator-piston rod
recuperator-piston rod nut
replenisher piston head
bottom rib of piston
circumferentially compressible piston ring
compound piston ring