No, the PM trailer is a shipping container one.
With the "lowboy" the load area is at or below the height of the top of the wheels while the PM one has the load area above the top of the wheels.
That PM trailer is common in the UK and pretty well world wide for shipping containers. For a short time the design was simply a skeleton of a central spine and two or three cross pieces, one at the front and one at the back and one in the centre, but these had the problem of the trailer and load twisting around the central spine and the trailer and load overturning as the vehicle negotiated roundabouts and so went out of use.
Strangely enough, this happened not because the truck was going too fast but because it was going too slow for the torsional forces operating no the trailer.