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Air injection reactors (Qpwxb)

Vehicles and equipment (Q)
    Vehicle components (Qp)
         Related Term (Associative): 
        Emission control systems (Qpw)
             Related Term (Associative): Pollutants (Jfgs); Pollution control (Jfgy)
            Exhaust system components (Qpwx)
                Air injection reactors (Qpwxb)
                Exhaust manifolds (Qpwxe)
                Exhaust pipes (Qpwxf)
                Mufflers (Qpwxm)