???? ??? ???? ???? ??? Api600/Api 6d ???? ?????????

???? ????? API600/API 6D ?????? ?? ???? Shijiazhuang Deye Piping Industry Co.,Ltd. ?? ???? ???? ?????? ?????? ???? ????????? ?? ?????? ????? ?? ????????? ????????. ??? ????? ??? ???????? ????? ??????? API? ??? ???? ???? ???? ???? ?????? ?????? ???????? ?? ??????? ??????? ?????? ?????? ??????? ????????? Shijiazhuang Deye Piping Industry Co.,Ltd. ????? ??? ????? ?????? ??? API600/API 6D ???? ????? ???????? ?????? ????? ??????? ??? ????? ???? ????? ?? ?? ??????? ??????. ????? ??? ???????? ?? ?????? ?????? ?? ?????? ???????? ???????? ????? ?????? ?????????? ??????? ?????? ???????? ??????????. ???? ??? ???? ?? ????? ????? ?????? ?? ?????????????? ?? ?????????? ?? ????? ??????? ????? ?????? ?? ?????? ?????????? ??????? ????? API600/API 6D ?? Shijiazhuang Deye Piping Industry Co.,Ltd. ???? ?????? ?????? ???? ?????? ??????? ???? ??? ???????? ???? ?????? ????? ????? ????? ????? ???????? ????????