{HEAD ~ The current liquid level} is measured by the use of {TAIL ~ a liquid level sensor} 6, and said maximum amount supplemented is calculated 
{ HEAD ~ The current liquid level } is measured by the use of { TAIL ~ a liquid level sensor } 6 , and said maximum amount supplemented is calculated
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH