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You are describing a layout trick for large (wide) transistors. It is much easier to explain if you can see the picture. Essentially, for very large W the poly gate becomes fairly long and thus has a fair bit of resistance associated with since it poly is fairly high in ohms/sqare compared to metal. You split up the large transistor into several parallel ones (fingers) and use metal to connect their gates together. Bend is just a variation on the same theme.
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