{HEAD ~ The mechanical oscillation} of the fluid is translated to {TAIL ~ the visco elastic polyurethane covering} upon which the patient is disposed 
is translated to
{ HEAD ~ The mechanical oscillation } of the fluid is translated to { TAIL ~ the visco elastic polyurethane covering } upon which the patient is disposed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH