However, when {TAIL ~ the thickness} of {HEAD ~ an oxide} is 2 μm or less, the oxide is not be uniformly coated on the tungsten wire 
However , when { TAIL ~ the thickness } of { HEAD ~ an oxide } is 2 μm or less , the oxide is not be uniformly coated on the tungsten wire
OTH OTH OTH 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