observation balloon
短語詞組
- observation balloon detail 觀察氣球
- air observation balloon 探空氣球
- air r observation balloon 探空氣球
- unmanned observation balloon [氣象][航]無人觀測氣球
- an observation balloon 觀測氣球
- the release of observation balloon 釋放觀測氣球
- balloon observation 氣球觀測
- pilot balloon observation 測風(fēng)氣球觀測
- pilot t balloon observation 測風(fēng)氣球觀測 返回 observation balloon