上面级 shàngmiànjí upper stage Definitions Defs Origin Strokes Stroke Words Sentences Sents 上面级 上面級 shàngmiànjí upper stage (rocketry) the final part of a multi-stage rocket that carries the payload into its final orbit or onto an interplanetary path
上面级 上面級 shàngmiànjí upper stage (rocketry) the final part of a multi-stage rocket that carries the payload into its final orbit or onto an interplanetary path
