This operating mode is also referred to as {HEAD ~ the cold air turbine mode} which is implemented close to {TAIL ~ the engine idle speed} 
is implemented close to
This operating mode is also referred to as { HEAD ~ the cold air turbine mode } which is implemented close to { TAIL ~ the engine idle speed }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL