After etching, the workpieces are washed with a mainly neutral washing liquid consisting of {HEAD ~ a solution} of {TAIL ~ the salt} required for regeneration of the etching agent 
of
After etching , the workpieces are washed with a mainly neutral washing liquid consisting of { HEAD ~ a solution } of { TAIL ~ the salt } required for regeneration of the etching agent
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH