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.
设计了伞齿轮完全闭塞式锻造的模架，核心部位刚性锁模机构具有良好的闭模特性。
A typical die set for closed-die forging has been designed, of which the core rigid close-die mechanism has a good property.
本文给出了钩子锁模闭式挤压新型模具结构。
A new type of structure of closed extrusion dies with locking hooks is put out.
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