{HEAD ~ The support members} comprising support arms pivotally attached between brackets positioned on {TAIL ~ the mounting surfaces} 
{ HEAD ~ The support members } comprising support arms pivotally attached between brackets positioned on { TAIL ~ the mounting surfaces }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL