{TAIL ~ The traction unit} is provided with a counter traction unit with at least two traction ropes which extend outwardly out of the lower frame and are connected to {HEAD ~ the top} of the upper frame 
{ TAIL ~ The traction unit } is provided with a counter traction unit with at least two traction ropes which extend outwardly out of the lower frame and are connected to { HEAD ~ the top } of the upper frame
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH