alundum powder emery powder的意思|示意
美 / /
英 / /
刚玉粉，金刚砂粉
alundum powder emery powder的网络常见释义
刚玉粉 ... coarse emery powder 粗金刚砂粉 alundum powder emery powder 刚玉粉 medium emery powder 中级金刚砂粉 ...