zircon sand造句

• Foundry zircon sand
  铸造用锆砂
• The pouring tests of the ladder foam sample were made in silica sand , chromite sand and zircon sand the results show that zircon sand and chromite sand have the better chilling effect , and the structure of the aluminum alloy is finer , the hardness and strength has large improvement , subsequently the investigation provides the reference for manufacturing aluminum alloy thin thickness mold with excellent quality
  结果表明，锆英砂和铬铁矿砂具有较好的激冷效果，得到的铝合金铸件组织细小，强度、硬度有较大的提高，为薄壁随型、质量优异的铝合金消失模模具制造提供了技术依据。