In order to achieve this, {HEAD ~ the tank} 14 is linked to a recycling device 22 via a feeding pipe 26 and {TAIL ~ a return pipe} 28 
is linked via
In order to achieve this , { HEAD ~ the tank } 14 is linked to a recycling device 22 via a feeding pipe 26 and { TAIL ~ a return pipe } 28
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH