How to inflate a birthday balloon

Birthday balloons are inflated as follows:

1, prepare the pump and balloon.

2. Insert the inflatable tube from the plastic head of transparent plastic.

3, then gently pump air into it, don't hit too much, it is easy to collapse.

4. Then pull out the pump and code the startup by hand, so as not to leak oil.

A balloon is a sealed bag filled with air or other gases. Balloons can be used not only as toys, but also as vehicles. There are many kinds of balloons. At present, balloons made of natural latex are mainly introduced, which can be used as decorations, arches for the opening ceremony, printed with their own advertising patterns as publicity, printed with photos of married couples as congratulations, decorated balls, bride floats and so on.

As a toy, balloon was once called "foreign eggplant". There is a small bamboo whistle at the opening of the balloon. When the balloon is filled with air, the exit will make a loud noise when it opens. If the balloon is big enough, the gas inside is lighter than the air of the same volume, and the buoyancy generated exceeds the weight of the airbag and attached objects (such as hanging baskets and hot air balloons), the balloon can rise.

Balloons can be used to carry observation instruments and passengers. Unmanned balloons loaded with equipment are often used for scientific research on the atmospheric environment at high altitude and sometimes for measuring cosmic rays.