waste sand

• 废砂

waste sand的用法和样例：

例句

1. In foundry production, two great pollution sources are use of resin binders containing toxic matters and large amount of solid garbage resulting from waste sands.
   摘要铸造生产的两大污染源，一是使用含有有毒物质的树脂黏结剂，二是排放的废砂成为大量固体废物。