unmanned free balloon的意思|示意
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无人自由气球
unmanned free balloon的网络常见释义
无人驾驶自由气球 ... unload 卸下 unmanned free balloon 无人驾驶自由气球 unmanned space 无人看管的机舱 ...
unmanned free balloon相关例句
An unmanned free balloon shall refer to a freely drifting inflatable object which is driven with no power, is piloted by nobody, is lighter than air, and whose gross mass is more than 4 kilograms.
无人驾驶自由气球，是指无动力驱动、无人操纵、轻于空气、总质量大于4千克自由漂移的充气物体。