iryuk bojo roket
launch assist rocket
fusée d'assistance au lancement ; fusée d'appoint ; fusée auxiliaire
우주선의 이륙 보조 로켓이 성공적으로 작동했다.
ujuseonui iryuk bojo roketi seonggongjeogeuro jakdonghaetda.
The launch assist rocket of the spacecraft operated successfully.
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