{HEAD ~ a rod} formed of an alkaline metal alloy tempered to have {TAIL ~ a tensile strength} of at least about 600 psi 
{ HEAD ~ a rod } formed of an alkaline metal alloy tempered to have { TAIL ~ a tensile strength } of at least about 600 psi
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH