{HEAD ~ A base} 10 of the work platform is supported with {TAIL ~ a bracket} 9 at, at least, three supporting portions 
{ HEAD ~ A base } 10 of the work platform is supported with { TAIL ~ a bracket } 9 at , at least , three supporting portions
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH