{HEAD ~ Suitable sacrificial materials} include polymers such as wax and epoxies, {TAIL ~ metals} such as aluminum, and glass 
include
{ HEAD ~ Suitable sacrificial materials } include polymers such as wax and epoxies , { TAIL ~ metals } such as aluminum , and glass
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH