The reason of non equality and the replacement relation between standard elliptical head and spinning elliptical head are also introduced.
运用薄膜理论分析了旋压椭圆形封头的本质及其应力分布，指出了它与标准椭圆形封头不等效的原因及替代关系。
The manufacture time and cost can be sharply reduced by adopting two times punch shaping process with the aid of the mould of standard elliptical head.
利用标准椭圆封头胎具，采用二次冲压成形工艺，缩短了制造周期，大大降低了制造成本。
The manufacture time and cost can be sharply reduced by adopting two times punch shaping process with the aid of the mould of standard elliptical head.
利用标准椭圆封头胎具，采用二次冲压成形工艺，缩短了制造周期，大大降低了制造成本。
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