{HEAD ~ The groups} of spade section and associated connectors are joined together to form a plurality of {TAIL ~ structural segments}  
{ HEAD ~ The groups } of spade section and associated connectors are joined together to form a plurality of { TAIL ~ structural segments }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH