???? Conventions ??????? ???? ????? ??? ???????? ??? ????? short. Specifies ??? ????????? duties ??? ??? ???? ????? maintenance machinery, and details ????? formal. Aids ??? ????????? ?? limiting disputes ??? parties making clear duties ?? side ?????? ?? guaranteeing performance undertakings ????? ????? ???? ????? ????? ?????? ???????, ???

??? ???? ?? ?????? ??? ???? ?????? ???? ??? ??????? ??????. ??? ???? ???? ?????? ??? ?????? ??????. ??? ??? ?????? ??? ??? ??? ??????? ????????, ??? ????? ????????. ?????? ????? ?????? ? ??????? ???? ? ??? ??????. ???? ??????? ?????? ???? ????? ????? ??? ??????? ???? ?????? ?? ?? ?????. ?? ????? ??? ?????? ???????? ???? ???? ????? ?????? ??? ???