With {HEAD ~ this type} of {TAIL ~ powder core}, these materials can provide suitably high heat resistance 
of
With { HEAD ~ this type } of { TAIL ~ powder core } , these materials can provide suitably high heat resistance
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH