bubble

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

box 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