by in the same slanted running direction immediately draw their trailers 17a 17d onto the rotatable floors 24 of the rail cars 18 and uncouple the trailers 17a 17d at the correct place on the rotatable floors 24 trailers 17a 17d are to be conveyed by the train 15 elsewhere again 10 minutes later thus at 10 20 o 39 clock in fig5 the railway employees have turned back again the rotatable floors 24 with the trailers 17 thereon into alignment with the rail cars 18 by actuating the aforementioned control members 21 fig7 when the control members 21 are actuated the floors 24 rotate automatically back in the reverse direction and automatically lock themselves completely within a few minutes the train has had then a delay of u00b1 20 minutes in which four trailers 16a 16d have left the train 15 and four new trailers 17a 17d have been drawn onto the train 15 if a train 15 with 30 trailers arrives and again departs with 30 new trailers loading and unloading can be done virtually in the same time on the condition that exactly as many 34 collecting 34 tractors 6 9 are standing by and exactly as many 34 supplying 34 tractors 11 14 with coupled trailers are standing by for those 30 trailers at.