The filter body is designed with {TAIL ~ a propeller shape} and has two blades connected by {HEAD ~ an axle} of the filter 
The filter body is designed with { TAIL ~ a propeller shape } and has two blades connected by { HEAD ~ an axle } of the filter
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH