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WIN-WIN speed hump has two indentations and the distance between the indentations is obviously bigger
than the vehicle wheelbase so that only one side of the vehicle wheels can pass throngh the hump’s indentation without quaking.The other side will quake ,which reduces the vehicle's speed . Reduce is the first principle of the 3R Green Economy . The indentations reduce one seventh material to product speed humps , which will save a lot of resource to the world .The indentations offer drivers an opportunity to pass the hump with one side not quaking . It ’ s humanitic to drivers and their lovers .