{HEAD ~ The liquid tank} includes {TAIL ~ an airtight vessel} to store the liquid; and at least two electrodes installed inside the airtight vessel 
includes
{ HEAD ~ The liquid tank } includes { TAIL ~ an airtight vessel } to store the liquid ; and at least two electrodes installed inside the airtight vessel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH