[经] days of average inventory on hand

kù cún cún huò píng jūn zhōu zhuǎn tiān shù ㄎㄨˋ ㄘㄨㄣˊ ㄘㄨㄣˊ ㄏㄨㄛˋ ㄆㄧㄥˊ ㄐㄩㄣ ㄓㄡ ㄓㄨㄢˇ ㄊㄧㄢ ㄕㄨˋ