The extension member extends outwardly from the outer periphery in {TAIL ~ a first direction} of the imaginary line for rotating {HEAD ~ the main body} 
The extension member extends outwardly from the outer periphery in { TAIL ~ a first direction } of the imaginary line for rotating { HEAD ~ the main body }
OTH OTH OTH OTH 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 HEAD