{HEAD ~ A means} is provided for filtering and drying {TAIL ~ the compressed air} entering the instrument air path 
is provided for filtering
{ HEAD ~ A means } is provided for filtering and drying { TAIL ~ the compressed air } entering the instrument air path
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH