{HEAD ~ The heating devices} 26, 27, 28, 29 for the drying of the web can be of {TAIL ~ any development} 
of
{ HEAD ~ The heating devices } 26 , 27 , 28 , 29 for the drying of the web can be of { TAIL ~ any development }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL