...生产特性和方法 英文名称： Reference radiation fields - Simulated workplace neutron fields - Characteristics and methods of production 页数： 8 采用标准： 被替代标准： 归口单位： 引用标准： 分类号： 发布日期： 实施日期： 起草单位： 中国...
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A novel type diamond dry cutting wheel, newly developed by the authors, is introduced, and some of its structure characteristics, production methods and application results are also presented.
并介绍了作者最近研究成功的新型风冷式金刚石切割片的结构特点、制造方法和使用效果。
The paper analyzes the characteristics of ventilation system of the old mines and the affects on production and introduces some methods of improving the ventilation system of the old mines.
分析了老矿井通风系统的特点及给生产带来的影响，给出了老矿进通风系统的改造步骤和方法。
These two methods have the characteristics of simple process. high production efficiency and low production cost.
此两种方法工艺简单，生产效率高，生产成本低。
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