Konteksts: [..] Mechanical coupling devices may be with one-piece coupling balls. [..]
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.55- Uniform provisions concerning the approval of mechanical coupling components of combinations of vehicles.