尚行特惠关税

[经] existing preferenatial duties

shàng xíng tè huì guān shuì ㄕㄤˋ ㄒㄧㄥˊ ㄊㄜˋ ㄏㄨㄟˋ ㄍㄨㄢ ㄕㄨㄟˋ