The key point of the part is how the suburb employment centers promote the formation of the multi-central metropolitan area as well as how they cause the central cities feebly.
这部分论述的重点是郊区就业中心是如何促进多中心的大都市区的形成以及如何导致中心城市的衰弱。
Taking advantage of the flexibility of the multi-point die, new sheet forming techniques have been developed, which realize the formation of parts of large size and with large deformation.
注意到多点模具的灵活性优势，新的成形技术已被开发出来，其中实现大尺寸和大变形部位的形成。
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