Generally, {HEAD ~ the usual, most frequent force} acting on the clasps of personal ornaments or furnishings is {TAIL ~ tension} 
is
Generally , { HEAD ~ the usual , most frequent force } acting on the clasps of personal ornaments or furnishings is { TAIL ~ tension }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL