AMTR System Sp. z o.o. is a manufacturer of hydraulic dock levellers with a pull-out lip, type: AMTRV-CD 30 (standard version). The function of the hydraulic dock leveller is to connect the building to the vehicle load bed by bridging the difference in level between the two. The CD ( COMBIDOCK ) system is characterised by a telescopic pull-out and split lip. This lip has been designed to cater for a diverse range of vehicles, differing in design and loading area dimensions. Using the switch on the control panel, the operator selects the type of vehicle to be operated and selects the appropriate leveller mode.