???? ??????? API598: ?????? ????? ?????? ??????? ??????

???? ??????? API598 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ?? ????? ?????? ??????????? ?????? ?? ???? ????? ?????? ?? ??????? ?? ????? ???????? ????????. ?? ????? ??? ?????? ???? ?????? ??????? ????? ??????? API598? ??? ???? ?????? ??????? ????????? ?????? ???????. ????? ???? ??????? ?????? ???? ?????? ??? ????? ??? ??????? ????????. ???? ?????? ??????? ????? ?? ?????????? ??? ?? ??? ?????? ??????? ???????? ???????? ?????? ?????? (HVAC)? ????????? ??????????? ???????. ????? ?????? ?? ?????? ?????? ?? ??????? ??? ??????? ???????? ???????? ??????? ????? ?????? ???????? ?????? ????????? ??????? ????? ??????? ????????? ?? ????? ???? ???????? ?????? ??? ??????? ???????? ???? ???? ??????? ??? ??????? ?????? ?????? ??????. ???? ????? ?????? ????? ??????? ?????? ????? ??? ???? ??????. ???????? ??? ???? ??? ???? ????? ???? ????? ??????? ?????? ???? ?????? ??????? ?? ??????. ?? ????? ??????? API598 ?? Shijiazhuang Deye Piping Industries Co.,Ltd. ?????? ?? ?????? ???? ???? ???????? ???? ?? ?????? ????????