Advantageously, {HEAD ~ the shaper} is made of a material which withstands {TAIL ~ the resin polymerisation temperature}, for example, a rigid metal alloy such as a steel or an aluminium alloy 
Advantageously , { HEAD ~ the shaper } is made of a material which withstands { TAIL ~ the resin polymerisation temperature } , for example , a rigid metal alloy such as a steel or an aluminium alloy
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH