{TAIL ~ The strength} of the acid solution is chosen to rapidly dissolve the oxides or the oxygen containing compounds, and {HEAD ~ the choice} is within the skill of a person skilled in the art 
{ TAIL ~ The strength } of the acid solution is chosen to rapidly dissolve the oxides or the oxygen containing compounds , and { HEAD ~ the choice } is within the skill of a person skilled in the art
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH