This vehicle paper model is a 300 Type Trolleybus (aka trolley bus, trolley coach, trackless trolley, trackless tram or trolley), designed by Kurobe Dam. A trolleybus is an electric bus that draws its electricity from overhead wires using spring-loaded trolley poles. Two wires and poles are required to complete the electrical circuit. This differs from a tram or streetcar, which normally uses the track as the return part of the electrical path and therefore needs only one wire and one pole. They also are distinct from other kinds of electric buses, which usually rely on batteries.
You can download this papercraft model here: 300 Type Trolleybus Free Vehicle Paper Model Download