The results show that the extrusion quality of even die, cone die and pre protection die are better, but that of the replace die is worse.

挤压结果表明：平模、锥模和前置保护分流模成型质量较好，而替代式保护分流模挤压失败；

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Mo interval: measuring the internal layout especially the protection of the gas only in fully enclosed rooms, but also the flexibility to adjust various parts of the Cone pressure balance.

间隔莫：艇身内部的间隔莫不仅能保护各气室的完全密封，而且也可以灵活的调节各个锥体部分的压力平衡。

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