???? ??????? API 609 - ???? ???? ??????

?????? ??????? ??????? ?????????? ?? ???? ??????? API 609 ?? ???? Shijiazhuang Deye Piping Industries Co.? Ltd. ?? ????? ???????? ????? ?????? ?????? ???????? ??????? ???? ????? ???? ??????? ????????? ??? ???? ?????? ??? ??????? ?? ???? ???? ???????? ?????? ?? ???? ?????? ?????? ??????? ?????? ??? ?????? ??????? ????? ?? ??????????????????? ??? ?? ??? ????? ??????? ???????? ?????? ??????? ??????? ??????? ????????? ????????. ????? ?????? ???? ??????? ?????? ?????? ????? ?????? ??? ??????? ??? ?????? ?????? ?????? ?????? ?? ???? ????? ??????? ?????? ?? ??????? ??? ??????? ??????. ???? ??????? API 609 ????? ??????? ?????? ?? ??????? ???????? ????? ?????? ?????? ??????? ???????? ???????. ???? ??? ????? ??? ???? ?????? ???? ????? ?? ???? ????? ????? ??? ???? ??????????? ??? ??????? ???????? ???????? ????? ?????? ?????? ???? ??????. ?? ?? ???????? ?????? ???? ???????? ?????? ????????.