prepared moulding sand

例句：

1. 1.The engineer prepared the moulding sand for the construction site.
   工程师为施工现场准备了预制型砂。
2. 2. The builders used this type of sand in their project.
   建筑工人在他们的项目中使用了这种类型的砂。
3. 3.The sand was carefully mixed to ensure the right consistency for the moulding process.
   砂被小心混合，以确保成型过程所需的正确稠度。