{TAIL ~ A dispenser} is disclosed which releases {HEAD ~ a substance} such as chlorine into an aqueous solution such as the water of a swimming pool 
{ TAIL ~ A dispenser } is disclosed which releases { HEAD ~ a substance } such as chlorine into an aqueous solution such as the water of a swimming pool
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH