| 摘要 |
A plastic bottle has a polygo nally-shaped bottle body, and the bottle body has a concave rib formed around its complete circumference. The rib has a rib central circumference, a rib upper circumference adjoining the upper edge of the rib central circumference, and a rib lower circumference adjoining the lower edge of the rib central circumference. The rib central circumference is formed in a shape that is non-homothetic with that of the rib upper circumference or the rib lower circumference.
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