Small balloon height.

气圈高度小。

youdao

These curves also show the existence of the balloon limitation, which limits the Max balloon height and the min. yarn tension during the rings...

另外这些曲线还清楚地显示了“极限气圈”的存在，在生产中制约着气圈高度的最大极限和纱线张力的最低极限。

youdao

During the ascent the balloon is constantly widening because of the decrease of atmospheric pressure, and at a certain height it will inevitably burst.

在上升的过程中，随着气压的降低，气球不断膨胀，到一定的高度，气球就会爆破。

youdao

Unlike a conventional hot air balloon where the height is controlled by a burner, the gas balloons are filled with hydrogen and controlled by releasing gas to go down and throwing out ballast to go up.

BBC: Wiltshire

"People were jumping out of the balloon from about the height of a seven-storey building, " Cherry Tohamy, an Egyptian who was in another balloon, told the BBC.

BBC: Egypt balloon crash: Two Britons and UK resident die

Finally, at a height of almost 19km, the balloon burst and the payload fell back to earth helped along by a parachute.

BBC: Giant weather balloon carries out its sky mission