{HEAD ~ Small DC electric motor} 16 is mounted upon the framework and carries {TAIL ~ fan blade} 18 on its output shaft 
carries
{ HEAD ~ Small DC electric motor } 16 is mounted upon the framework and carries { TAIL ~ fan blade } 18 on its output shaft
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH