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