???? ????? ???? ?????? ????? ?????? ?????? API 598 - ????????? ??????? ??????

???? ??????? ??????? ??????? API 598 ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ???? ????? ????? ????? ?? ????????? ???????? ?????????????? ???? ??????? ??? ????? ?????? ?????? API 598? ??? ???? ???????? ????????? ??????? ????? ??????? ?????? ??????? ???????. ??? ????? ??????? ????? ?? ?????????? ??? ?? ??? ?????? ????? ?????? ??????????????? ??????? ??????. ???? ?????? ????? ????? ?????? ???? ??? ???? ?? ??? ?????? ???????? ???????? ?? ??????. ???? ?????? ?????? ??????? ??????? ????????? ?? ????? ??????? ??? ??? ?????? ???????? ??? ?? ???? ??????? ??????. ????? ???? ??????????? ??? ??????? ???????? ???????? ?????? ?????? ????? ?????? ???? ???????? ??????? ??????? ???????. ???? ???? ??????? ??????? ?????? ?????? API 598 ?????? ??? ???????? ??????? ????????? ?? ????? ????????.