The term structural foam refers to {TAIL ~ a body} with {HEAD ~ a low density cellular core} which has a solid integral skin 
The term structural foam refers to { TAIL ~ a body } with { HEAD ~ a low density cellular core } which has a solid integral skin
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH