{HEAD ~ The control} provides {TAIL ~ quick response} and actuates 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 
provides
{ HEAD ~ The control } provides { TAIL ~ quick response } and actuates 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
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH