[经] ratio of raw material inventory to cost of manufacture

yuán liào kù cún yǔ zhì zào chéng běn bǐ lì ㄩㄢˊ ㄌㄧㄠˋ ㄎㄨˋ ㄘㄨㄣˊ ㄩˇ ㄓˋ ㄗㄠˋ ㄔㄥˊ ㄅㄣˇ ㄅㄧˇ ㄌㄧˋ