I think the horizontal ones are reservoirs and the vertical are actuators , a similar one on a siding near Landquart had that sort of arrangement and I asked an RhB chap the same question and he said “For brake working” and mentioned the slopes they have to go up so they need good independent braking . It may have lost something in translation , so I cannot guarantee the answer . There was also the suggestion of water cooling for the brakes , so they could be header tanks .
The problem is , some of the heavy lift wagons in Europe have hydraulic lift gear which requires big hydraulic tanks , but I don’t recall seeing any separation points on the wagon I looked at .
For the truckies among us , it equates to the goose neck trailers and split bed trailers too .
Mike
PS A little known fact about some of the heavy stuff . Companies tender for the job starting from scratch and finishing up with on-site delivery , so it is not unusual for a new wagon or big rig (really big) to be bought as part of the contract , which leads to some confusion when you see British registered trucks operating in , say , Indonesia or Brazil . It would not always be cost effective to ship such vehicles back home , so to speak , so the locals get them at a knock down price .
In Germany , I have seen special landing areas built out into the Rhine for docking barges which carry transformers ; the whole road vehicle goes onto special barges complete with load . Keeping the barge level needs a lot of pumps!!!
Heavy lift work is extremely interesting
Mike