Improper for large blocks, impure blocks mixed with iron and materials with high milling performance.

 
  • 對于塊度大,夾有鐵質(zhì)雜塊以及磨琢性高的物料不宜采用。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan