????? ????? ???? ????? ?????? ???? ?????? ????? ???? ???? ??????? ?? Duct Testing and Balancing ?? ????. ????? ??? ?????? ????? ????????? ?????? ?????? ??????? ? ????? ???????? ????????. ??? ????? ?????? ????? ????????? ???? ????????? . ???? ?? ????? ??????? ????????? ?? ????? ???? ????? ??????: ?????? ?????? ????????, Procurement ?????? ???????,