In some cases, some of {HEAD ~ the functions} or {TAIL ~ modes} may be omitted, particularly the air conditioning functions 
In some cases , some of { HEAD ~ the functions } or { TAIL ~ modes } may be omitted , particularly the air conditioning functions
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH