Thus, for instance, {HEAD ~ both the Venturi effect} and the Coanda effect may be used to increase {TAIL ~ the efficiency} of the overall system 
used to increase
Thus , for instance , { HEAD ~ both the Venturi effect } and the Coanda effect may be used to increase { TAIL ~ the efficiency } of the overall system
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH