The present invention relates to apparatuses and methods for evaluating {HEAD ~ the performance} of {TAIL ~ a joint} 
The present invention relates to apparatuses and methods for evaluating { HEAD ~ the performance } of { TAIL ~ a joint }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL