a tool that throws out a blast of steam laden with sand; used to clean or grind hard surfaces
sand blaster的用法和样例:
例句
long shelf-life 较长保质期
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。