An apparatus 1, further comprising dry air supply means for supplying dry air to {HEAD ~ the processing atmosphere} in {TAIL ~ said processing vessel} 
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An apparatus 1 , further comprising dry air supply means for supplying dry air to { HEAD ~ the processing atmosphere } in { TAIL ~ said processing vessel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL