| 摘要 |
A midsole has a hard portion and at least one soft portion. The hard portion of the midsole can support the shoe into a predetermined shape and the soft portion of the midsole will provide a bendable capacity for facilitating walking. The midsole is made by double tube injection molding method. Thus, the material capacity of the portion of the hard portion connecting with the soft portion will change gradually from the hard portion to the soft portion to provide a strong structure of the midsole.
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