Modeling sand

• 型砂

Modeling sand的用法和样例：

例句

1. A new type of sand storage silo with local fluidization and siphon discharging is recommended.
   提出了局部流态化虹吸卸料的新型砂仓。
2. This project aims to develop an auto-control unit of a direct-control optimizing system of green sand quality for a sand mixer.
   本课题的目的在于研制一种用于型砂质量直接优化控制系统的混砂机加料自动控制单元。