论文根据均衡凝固及大孔出流理论，用计算机辅助设计的方法改进了壳体灰铸铁件的铸造工艺。
In the paper, based on the Propotional Solidification Theory and Large Orifice Discharge Theory, the foundry technology of gray iron casting shell was designed by the method of CAD.
根据均衡凝固理论设计工艺，采用阶梯式浇注系统，压边冒口和冷铁，取得了满意效果。
The foundry method was designed based on the Proportional solidification theory. Step gating system, connor risers and chills were adopted. Successful result was obtained.
根据均衡凝固理论设计工艺，采用阶梯式浇注系统，压边冒口和冷铁，取得了满意效果。
The foundry method was designed based on the Proportional solidification theory. Step gating system, connor risers and chills were adopted. Successful result was obtained.
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