[经] continuous system of physical inventory

yǒng xù shí dì pán cún zhì dù ㄩㄥˇ ㄒㄩˋ ㄕˊ ㄉㄧˋ ㄆㄢˊ ㄘㄨㄣˊ ㄓˋ ㄉㄨˋ