同根派生 sand blaster相关词英汉例句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。sand blaster更多例句