The apparatus is arranged at an exit where {HEAD ~ a workpiece} leaves {TAIL ~ a plating chamber} 
The apparatus is arranged at an exit where { HEAD ~ a workpiece } leaves { TAIL ~ a plating chamber }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL