对底注、中注及阶梯注三种浇注系统进行对比。
A comparison was made between the bottom gating system, middle level gating system, and step gating system.
如果采用底注式浇包，系统提供了专门的工具以保证正确的充型时间和流速。
If a bottom pour ladle is used, the system can also supply critical information to insure proper filling time and speed.
通过实际生产从工艺角度分析了底注法生产窄结晶温度范围高强度黄铜时夹杂、 缩孔缺陷的产生机理。
The mechanism of the inclusion and shrinkage cavity in high-strength brasses produced by bottom running method was analyzed from the point of view of production technology.
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