кульовий рівень (про кулю як геометричну фігуру); круглий рівень
magnetic bubble memory / magnetic bubble store
cross-level bubble
longitudinal-level bubble
elevating bubble
bubble of level
bubble spirit glass
double-bubble fuselage
air bubble
acoustic bubble submarine imitator
air bubble craft / vehicle
bubble
bubble and scale
bubble house
bubble housing
bubble sight
bubble tube
bubble-spirit glass
captured air bubble
captured-air-bubble ship
fluid level bubble assembly
level the bubble
magnetic bubble
magnetic bubble domain memory
magnetic bubble support circuits
magnetic bubble technology
security bubble
transverse bubble
bubble canopy
air box handhole cover
ammunition box
axle box
battery box