| 摘要 |
<p>The device has ladders (E1, E1b, E2, E2b) articulated by four axles (A1-A4) to allow deployment and reployment of the axles by two-way hydraulic cylinders (V1, V2). The cylinders are controlled by controllers (C1, C2) connected to a 12V hydro-electric power station supplied with power by a battery of a vehicle that draws a trailer. The controllers actuate the 12V hydro-electric power station to allow opening and closing of the cylinders. The four axles allow pivoting of the ladders.</p> |
