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二次空気導入装置
Wikipedia definition
1. Secondary air injectionSecondary air injection (commonly known as air injection, or colloquially smog pump) is a vehicle emissions control strategy introduced in 1966, wherein fresh air is injected into the exhaust stream to allow for a fuller combustion of exhaust gases.
Read “Secondary air injection” on English Wikipedia
Read “二次空気導入装置” on Japanese Wikipedia
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