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Secondary Air Pump By adding fresh air to the exhaust from the engine, the oxygen content in the exhaust is increased, so that the unburned HC (hydrocarbon) and CO (carbon monoxide) in the high-temperature exhaust can be burned and oxidized again, thereby reducing exhaust pollutants the goal of.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.