a dispensing head attachable to {TAIL ~ a mouth} of a beverage tank filled with {HEAD ~ beverage} 
a dispensing head attachable to { TAIL ~ a mouth } of a beverage tank filled with { HEAD ~ beverage }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD