In certain example embodiments, {HEAD ~ the velocity} of the air/wind may be increased within the channel by {TAIL ~ virtue} of features including, for example, retractable and directional vanes and side wall elements that help create constricting locations  
increased by
In certain example embodiments , { HEAD ~ the velocity } of the air / wind may be increased within the channel by { TAIL ~ virtue } of features including , for example , retractable and directional vanes and side wall elements that help create constricting locations
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH