The control provides {TAIL ~ quick response} and actuates {HEAD ~ the level control} to effect accurate maintenance of the required liquid level in an air pressure control system or, for example, a variable resistance control in an electrical control system 
The control provides { TAIL ~ quick response } and actuates { HEAD ~ the level control } to effect accurate maintenance of the required liquid level in an air pressure control system or , for example , a variable resistance control in an electrical control system
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH