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