| 2.3.3. | If it is intended to attach a trailer to a power-driven vehicle, the trailer shall be represented by an energy storage device whose maximum relative pressure p (expressed in kPa / 100) is that which can be supplied through the towing vehicle's supply circuit and whose volume V, expressed in litres, is given by the formula p x V = 20 R (R being the permissible maximum mass, in tonnes, on the axles of the trailer). | a0c0 |