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