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