The filament cathodes mounted in {TAIL ~ a fluorescent display tube} can reduce the power consumption of {HEAD ~ the fluorescent display tube} 
The filament cathodes mounted in { TAIL ~ a fluorescent display tube } can reduce the power consumption of { HEAD ~ the fluorescent display tube }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD