Combining with the nature of the storage and fragility of rice, by using the optimizing design method, working out the best vacancy of vacuumizing for rice.4.
3、结合大米真空包装的贮藏品质及脆值,通过优化设计来研究大米真空包装最佳真空度。
参考来源 - 结合流通环境对大米真空包装技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
This paper introduces a kind of vacuumizing system for X-ray machine head.
介绍一种X线机机头真空处理系统。
It has such advantages as small empty volume, high vacuumizing speed, simple and convenient structure, etc.
其优点是排空容积小、抽真空快、装置简单轻便、重量轻、体积小。
The utility model discloses a steam-extracting cooling system for improving the vacuumizing effect of a condenser.
本实用新型公开了一种提高凝汽器抽真空效果的抽汽冷却系统。
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