кульова опора карданної труби
negative thrust propeller / negative-thrust propeller
A tube / A-tube
transmitting-receiving tube (TR tube)
penetrating head injury / open head injury
drop head body (drop-head body)
head-to-head flyoff
infrared homing head (IR homing head)
ball joint
ball socket
paint ball gun
rounds of ball cartridges
rubber-ball grenade
rubber-ball round
angular ball bearing
angular contact ball bearing
annular double-row ball bearing
annular single-row ball bearing
annular single-row shielded ball bearing
ball bullet
ball check valve
ball cock
ball coupling
ball guide
ball holder
ball journal
ball mounting
ball powder
ball race
ball raceway
ball retaining spring
ball stud nut
ball thrust