{TAIL ~ The inner drive} is driven about {HEAD ~ an axis} to pump a corrosive process fluid 
{ TAIL ~ The inner drive } is driven about { HEAD ~ an axis } to pump a corrosive process fluid
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH