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