确定了锥形模膛的最小长度、模腔锥角与毛坯长度的关系；

The minimum depth of conical die and the relationship between coning of die cavity and workpiece length are determined;

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确定了锥形模膛的最小长度、模腔锥角与毛坯长度的关系；

The minimum depth of conical die and the relationship between coning of die cavity and workpiece length are determined;

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