{HEAD ~ A vibration generator} is positioned on {TAIL ~ each} of one or more container walls to introduce vibrations with a selected frequency through the container wall and into the chemical bath liquid 
is positioned on
{ HEAD ~ A vibration generator } is positioned on { TAIL ~ each } of one or more container walls to introduce vibrations with a selected frequency through the container wall and into the chemical bath liquid
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH