{TAIL ~ a hydraulic connection} leading from said brake circuit to low pressure and {HEAD ~ high pressure accumulator systems}; and 
{ TAIL ~ a hydraulic connection } leading from said brake circuit to low pressure and { HEAD ~ high pressure accumulator systems } ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH