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Analyzing and predicting the relation between air–fuel ratio (AFR), lambda (λ) and the exhaust emissions percentages and values of gasoline-fueled vehicles using versatile and portable emissions measurement system tool | SpringerLink
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Amazon.com: Ballenger Motorsports AFR500v2 - Air Fuel Ratio Monitor Kit with NTK Calibration Grade sensor - Gas Display | Wideband Range | 7ft : Automotive
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