[经] independent single operating unit

dú lì dān yī jīng yíng de dān wèi ㄉㄨˊ ㄌㄧˋ ㄉㄢ ㄧ ㄐㄧㄥ ㄧㄥˊ ㄉㄜ˙ ㄉㄢ ㄨㄟˋ