Valsts valodas centra izstrādātie transporta, infrastruktūras un sakaru termini

Konteksts: [..] Constant tone signal device (constant frequency spectrum), e.g. horns. [..]
Avots: Agreement concerning the adoption of uniform technical prescriptions for wheeled vehicles, equipment and parts which can be fitted and/or be used on wheeled vehicles and the conditions for reciprocal recognition of approvals granted on the basis of these prescriptions, Regulation No. 116- Uniform technical prescriptions concerning the protection of motor vehicles against unauthorized use.