{TAIL ~ The corresponding apparatus} is intended to have a simplest possible construction which fulfils the limited constructional possibilities available, and {HEAD ~ the heating requirements} of the fluidized bed are minimized as far as possible 
{ TAIL ~ The corresponding apparatus } is intended to have a simplest possible construction which fulfils the limited constructional possibilities available , and { HEAD ~ the heating requirements } of the fluidized bed are minimized as far as possible
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH