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Audible warning devices in vehicles (Qtpswa)

Vehicles and equipment (Q)
    Equipment (Qt)
         Use For: Apparatus; Devices
         Related Term (Associative): Control devices (Dcj); Communication devices (Dsg); Testing equipment (Gu); Structural parts (Pbp); Building materials (Rbm)
        Equipment by end use (Qtp)
             Related Term (Associative): Types of machines (Qtbmb)
            Safety equipment (Qtps)
                 Use For: Safety appliances; Safety devices
                 Related Term (Associative): 
                Warning devices (Qtpsw)
                     Related Term (Associative): 
                    Audible warning devices in vehicles (Qtpswa)