At the end of its operating time, the component has, for example, a depletion of aluminium in {HEAD ~ a region} near {TAIL ~ the surface} 
near
At the end of its operating time , the component has , for example , a depletion of aluminium in { HEAD ~ a region } near { TAIL ~ the surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL