The protective cover 70 is provided with {TAIL ~ capacitance} 72 and {HEAD ~ a metal sensor} 73 
The protective cover 70 is provided with { TAIL ~ capacitance } 72 and { HEAD ~ a metal sensor } 73
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH