{HEAD ~ The pitch bearing} 400, yaw bearing 125, main bearing 130, generator bearing or {TAIL ~ any other bearing} or item requiring lubrication may be considered a component or components of wind turbine 100 
{ HEAD ~ The pitch bearing } 400 , yaw bearing 125 , main bearing 130 , generator bearing or { TAIL ~ any other bearing } or item requiring lubrication may be considered a component or components of wind turbine 100
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH