With adoption of post processing of vacuum pneumatic conveying,the conveying cooling and purification of tripolycyanamide can be fulfilled at the same time,which t...
改用吸送式气输送后处理工艺后,既
输送,
却、提纯三聚氰胺,实现自动化包装,并彻底改善工作环境。
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When a student recently saw two workmen using a pneumatic drill outside his university, he immediately telephoned the police and informed them that two students dressed up as workmen were tearing up the road with a pneumatic drill.
最近有个学生看见两个工人在大学校门外用风钻干活,马上打电话报告警察,说有两个学生装扮成工人,正在用风钻破坏路面。