Passivation layers are formed and grow on the surfaces of {HEAD ~ the walls} formed between {TAIL ~ the plurality} of micro passageways, thereby forming the bodies 
Passivation layers are formed and grow on the surfaces of { HEAD ~ the walls } formed between { TAIL ~ the plurality } of micro passageways , thereby forming the bodies
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH