Rather, in the case of virgin workpieces, it is believed that machining the component, such as an SiC boat, produces particles which deposit upon {HEAD ~ the surface} of {TAIL ~ the component} 
of
Rather , in the case of virgin workpieces , it is believed that machining the component , such as an SiC boat , produces particles which deposit upon { HEAD ~ the surface } of { TAIL ~ the component }
OTH OTH OTH OTH OTH OTH OTH OTH 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