{HEAD ~ Gas/vacuum and fracturing fluid} are supplied to hand piece 36 via {TAIL ~ a set} of supply lines 42 and 44 respectively 
{ HEAD ~ Gas / vacuum and fracturing fluid } are supplied to hand piece 36 via { TAIL ~ a set } of supply lines 42 and 44 respectively
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH