???? ??????? API 609 ???? ?????? ????? ?????

?????? ????? ???????? ?????? ?? ???? ??????? API 609 ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ????? ???????? ????? ?????? ?????? ???????? ??????? ???? ????? ???? ??????? ????????? ??? ???? ?????? ??? ??????? ?? ???? ???? ???????. ?????? ?? ???? ?????? ??????? ??????? ?????? ??? ?????? ??????? ????? ?? ?????????? ??? ?? ??? ??????? ???????? ?????? ?????? (HVAC)? ??????? ??????? ????????? ????????. ???? ????? ?????? ??? ??????? ?????? ?????? ????? ?????? ??? ??????? ??? ?????? ?????? ??????? ?????? ?? ???? ????? ??????? ???????? ?????? ??? ??????? ??????? ??? ?????? ?? ?????? ?????? ?? ??????? ???????? ???? ??????? API 609 ????? ??? ???? ??????? ?????? ??????? ??????? ???????. ???? ??? ????? ??? ???? ?????? ???? ????? ?? ???? ????? ????? ??? Shijiazhuang Deye Piping Industries Co., Ltd. ????? ?????? ??????? ?????? ???? ??????. ?? ?? ???????? ?????? ???? ???????? ?????? ????????