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