{HEAD ~ A method} for treating heavy metals which comprises adding the heavy metal treating agent 25 to a waste water containing at least one heavy metal, and stirring {TAIL ~ the resulting mixture} 
comprises stirring
{ HEAD ~ A method } for treating heavy metals which comprises adding the heavy metal treating agent 25 to a waste water containing at least one heavy metal , and stirring { TAIL ~ the resulting mixture }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL