In placing the steel T posts in the channel 14, {HEAD ~ a post driver}, which is typically {TAIL ~ a cylinder} with an integral cap, is driven against the steel posts and rams the steel posts into the channel bed 20 
is typically
In placing the steel T posts in the channel 14 , { HEAD ~ a post driver } , which is typically { TAIL ~ a cylinder } with an integral cap , is driven against the steel posts and rams the steel posts into the channel bed 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH