????? ?? ??? ??? ?? ????? ????????. ??? ??? ????????? ????? ?? ????? ?? ????? ??? ??? ???? ???? ?? ????? ??????? ????? ????: ??? ???? ????? ??? ??? ??????? ????? ????? ?? ???? ???? ???? ?? ?????. ???? ?????? ???? ???????? ???????? ???? ????? ??? ????? ?????? ???? ??? ?????. design and maintenance are essential elements of the crafted environment