IV. Foldable Aluminium Alloy Aerial Opus Platform: a familia foldable vitae, quae est quaedam vitae, praesertim a domum foldable vitae. The beam is composed of two steel plates, and it is welded and connected by a number of inverted U-shaped connecting cards, forming a gap in the middle, and the front and back ends are respectively placed in the track formed by the gap by the trolley connected by the forward and retreat motor and the electric hoist . Ideo defectus inconveniens structuram et inconveniens usum existentium familia attollo sunt superare. In utilitatem exemplar habet commoda rationabile structuram, simplex fabricantibus, humilis sumptus, convenient usum, fortis practicability, et potest esse per plures familiis cum una apparatus vel usus per unius familiae.