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