coating the walls of the cavity with {HEAD ~ a coating material} by depositing {TAIL ~ coating material} in the cavity, closing off the cavity, and rotating the stack of base sheets in such a way that the coating material flows around and progressively coats the walls of the cavity; and 
coating the walls of the cavity with { HEAD ~ a coating material } by depositing { TAIL ~ coating material } in the cavity , closing off the cavity , and rotating the stack of base sheets in such a way that the coating material flows around and progressively coats the walls of the cavity ; and
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH