The difference between {TAIL ~ the current liquid level} and {HEAD ~ the upper limit} of liquid level is taken as the maximum amount supplemented when only one component is supplemented 
The difference between { TAIL ~ the current liquid level } and { HEAD ~ the upper limit } of liquid level is taken as the maximum amount supplemented when only one component is supplemented
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH