A safety device loosely extends from {TAIL ~ the first channel} to {HEAD ~ the second channel} when the first and second channel are disposed in the first operative position 
A safety device loosely extends from { TAIL ~ the first channel } to { HEAD ~ the second channel } when the first and second channel are disposed in the first operative position
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH