{HEAD ~ The graphite particles} and their distribution in shape and {TAIL ~ size} should correspond to class VI/6 of the standard EN ISO 945 1994 or even more refined 
in
{ HEAD ~ The graphite particles } and their distribution in shape and { TAIL ~ size } should correspond to class VI/6 of the standard EN ISO 945 1994 or even more refined
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH