???? ??????? ??????? ???? ????? operation ???????? ??? ????? long. Defines ??? ????????? obligations ??? ??? ???? relates to ????? machinery, ????????? schedules ???????. Aids ??? ????????? ?? limiting conflicts ??? sides and clarifying ???????? ?? party ?????? ?? guaranteeing ???? projects ??????? ????? ???? ????? ????????? ?????? ???????,

????? ?????? ? ?????? ?? ????? ????????, ?? ????? ?? ?????? ?????? ??????? ????????. ???? ??????? ???? ??? ??? ?????? ????? ? ????? ???? ????. ??? ??????? ??? ?????? ???????: ???????, ??????? ???????, ??????? ????????. ?? ?? ?? ????? ????? ??????? ?????? ???? ???? ????? ?????? ? ?????? ??? ???. ?????? ????? ????? ??????? ?????? ?? ??? ??