The balloon control-rings used in ring frames divide the spinning balloon into two parts:the upper one and the lower one.

环锭细纱机安装气圈环后将形成上下两段气圈。

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The floating time of aerostat-load-radar is very long in modern warfare. Therefore the high stable and reliable balloon control system is needed.

分析现代战争的特点和气球载雷达的功能，指出气球载雷达具有长时间浮空的特性。

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You need several friends to help you control the balloon.

你需要几个朋友帮你控制气球。

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Fossett will use a bigger balloon this time, and control its altitude by working a propane ethane burner.

CNN: Global balloon race to get off the ground tonight

Fueled by Albuquerque's crisp fall climate and predictable air currents that allow balloonists to control their flights, the Balloon Fiesta attracts some 700 balloons from more than 50 countries.

CNN: 7 breathtaking ballooning adventures