For example, as mentioned above, {HEAD ~ the spring} 34 may be formed of {TAIL ~ a chrome silicon steel alloy} 
formed of
For example , as mentioned above , { HEAD ~ the spring } 34 may be formed of { TAIL ~ a chrome silicon steel alloy }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL