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