???? ?? ????? S2 R 68 ??? ??? ????? ??????? ? ?????? ??? ?? ???? ????? ????? ?? ????. ??? ???? ?? ??? ??? ?????? ?????? ?? ????? ????? ?????? ??? ??? ? ?? ???? ????? ?? ??? ?? ?? ???????? ???? ??? ????. Corena S2 R 68 : Exceptional Performance in Demanding Environments Shell Corena S2 R 68 is