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The design of PU oil seals also plays a significant role in their functionality
pu oil seal. They often feature a-like structure that creates a tight seal against the mating surface, preventing the leakage of oil or other fluids. This design, combined with the elastic memory of polyurethane, allows the seal to recover its original shape after compression, maintaining a consistent seal even under fluctuating pressures.

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Conversely, drum brakes are more prone to overheating, which can lead to reduced efficacy. However, they offer stronger braking force at lower speeds. Due to their design, drum brakes can provide a mechanical advantage, making them suitable for small vehicles and older models.
drum brake vs disc brake difference
