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