The device includes {HEAD ~ a frame} which has an upper surface to support {TAIL ~ the individual} to be subjected to traction 
The device includes { HEAD ~ a frame } which has an upper surface to support { TAIL ~ the individual } to be subjected to traction
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH