{HEAD ~ The driving motor} 44 is connected to a power supply 81 and to {TAIL ~ a switch} 82 which has an actuating button 83 
{ HEAD ~ The driving motor } 44 is connected to a power supply 81 and to { TAIL ~ a switch } 82 which has an actuating button 83
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH