{TAIL ~ A device} supports {HEAD ~ the assembly} from a support and a safety device loosely extends from a first channel to the second channel 
{ TAIL ~ A device } supports { HEAD ~ the assembly } from a support and a safety device loosely extends from a first channel to the second channel
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH