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