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