n. impression
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;
测定模膛加热的温度-时间曲线及不同起始温度下模膛温度与时间的关系。
The temperature-time curve of the heated die cavity and the relation between temperature and time under different initiatory temperature were determined.
对于无飞边闭式模锻，由于各种因素的影响，很难使坯料体积与闭式模膛的容积恰好相等。
It's very difficult to make the volume of blank material and bulk of closed cavity equal because of all kinds of influence of factors for no-draft closed-forging.
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