means for replenishing and maintaining {TAIL ~ the liquid} in said water container at {HEAD ~ a predetermined liquid level} 
means for replenishing and maintaining { TAIL ~ the liquid } in said water container at { HEAD ~ a predetermined liquid level }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD