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