In the technical parameter group, the prime parameter is price and {TAIL ~ the parameter set} is a set of {HEAD ~ performance parameters}  
In the technical parameter group , the prime parameter is price and { TAIL ~ the parameter set } is a set of { HEAD ~ performance parameters }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH