The upper case is insulated from the conductive liquid, except at a hole in {HEAD ~ the insulation} lying along {TAIL ~ a central axis} of the lower case and upper case 
lying along
The upper case is insulated from the conductive liquid , except at a hole in { HEAD ~ the insulation } lying along { TAIL ~ a central axis } of the lower case and upper case
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH