Other environmental conditions that interfere with the transmitting and receiving signals may further bear on the values of {HEAD ~ V1} and {TAIL ~ V2} 
Other environmental conditions that interfere with the transmitting and receiving signals may further bear on the values of { HEAD ~ V1 } and { TAIL ~ V2 }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL