[经] direct material cost percentage rate
zhí jiē yuán liào chéng běn bǎi fēn lǜ ㄓˊ ㄐㄧㄝ ㄩㄢˊ ㄌㄧㄠˋ ㄔㄥˊ ㄅㄣˇ ㄅㄞˇ ㄈㄣ lv4