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Propellers (Qphp)

Vehicles and equipment (Q)
    Vehicle components (Qp)
         Related Term (Associative): 
        Vehicle push devices (Qph)
            Axles (Qphb)
                 Related Term (Associative): 
            Driving wheels (Qphd)
            Propellers (Qphp)
                 Use For: Air screws
                Types of propellers (Qphpb)
                Propeller components (Qphpy)
            Rotors (Qphr)
                 Use For: Helicopter rotors; Impellers