The apparatus 1, wherein said alloy lining has a thickness of from 0.5 to 5 mm and the double layer coating has {HEAD ~ a thickness} of from 2 to {TAIL ~ 40 μm} 
The apparatus 1 , wherein said alloy lining has a thickness of from 0.5 to 5 mm and the double layer coating has { HEAD ~ a thickness } of from 2 to { TAIL ~ 40 μm }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL