摘要：Firstly, this text is introducing the traditional technology of vertical billet. Secondly, the text is describing technological process and equipment principle about first and second generation vertical billet machine. Thirdly, the text is illustrating the second generation machine’s superiorities by contrasting. Finally, we have put forward the thought of optimal to the second generation machine.
其他摘要：Firstly, this text is introducing the traditional technology of vertical billet. Secondly, the text is describing technological process and equipment principle about first and second generation vertical billet machine. Thirdly, the text is illustrating the second generation machine’s superiorities by contrasting. Finally, we have put forward the thought of optimal to the second generation machine.
