???? Conventions ??????? essential ????? operation projects ??? ????? short. Defines ??? ????????? duties ??? side ???? relates to ????? equipment, and details ????? official. ?????? ??? ????????? ?? limiting disputes ??? sides making clear ???????? ?? ??? Aids ?? guaranteeing quality ???????? ????? ????? ???? ????? ????????? ?????? ?????,

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