HIM-Met. Balloons, pilot balloon, radiosonde balloons Colour balloons, stratospheric balloons, pet balloons, zeppelins Gasholder
A balloon is a non-self-supporting, gas-tight casing which is filled with gas and has no self-propelled.
When filling gas (hot air balloon, balloon) or a carrier gas is used as helium or hydrogen (balloon gas) generally air. The balloon may be sealed if they were full, so the trapped gas may also be under pressure