{HEAD ~ A cover support mechanism} regulates {TAIL ~ an opening angle} of an openable cover with respect to a chassis of an electronic device 
regulates
{ HEAD ~ A cover support mechanism } regulates { TAIL ~ an opening angle } of an openable cover with respect to a chassis of an electronic device
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH