[经] quality of export and import commodities

jìn chū kǒu shāng pǐn zhì liàng ㄐㄧㄣˋ ㄔㄨ ㄎㄡˇ ㄕㄤ ㄆㄧㄣˇ ㄓˋ ㄌㄧㄤˋ