{TAIL ~ The apparatus} has a hollow body , with an inflow and {HEAD ~ an outflow} for the fluid  
{ TAIL ~ The apparatus } has a hollow body , with an inflow and { HEAD ~ an outflow } for the fluid
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH