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