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METHOD AND APPARATUS FOR PROVIDING SAFE SPEED OF A VEHICLE AND USING THE INFORMATION?keyword=METHOD AND APPARATUS FOR PROVIDING SAFE SPEED OF A VEHICLE AND USING THE INFORMATION?keyword=METHOD AND APPARATUS FOR PROVIDING SAFE SPEED OF A VEHICLE AND USING THE INFORMATION?keyword=METHOD AND APPARATUS FOR PROVIDING SAFE SPEED OF A VEHICLE AND USING THE INFORMATION 专利,更快更准确