{HEAD ~ The wood composite assembly} 7 contacts {TAIL ~ the sprocket} 8 first and this imparts an initial rapid compression action to the assembly 7  
{ HEAD ~ The wood composite assembly } 7 contacts { TAIL ~ the sprocket } 8 first and this imparts an initial rapid compression action to the assembly 7
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH