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