???? ???? ???? ?????? API 1500 ??? PSB ?? ????? ??????? ???????

???? ????? API 1500lbs PSB ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.? Ltd. ?? ???? ???? ?????? ?????? ?? ???? ????????? ???????? ?????????????? ??? ?????? ?????? ????? ??????? API? ??? ???? ?????? ?????? ?? ?? ???? ????? ?????? ??????? ???????. ?????? ??? ???? 1500 ???? ???? ??? ?????? ??????? ?????? ?? ???? ????? ?????? ?? ?????? ?? ???? ???????? ????????. ???? ?????? ????? ????? ??????? ???????? ???????? ??? ???? ???? ?? ?????? ??? ????? ?????? ??????????????? ?????? ??????. ???? ?????? ?????? ??????? ???????? ????????? ??? ???? ?????? ??????????. ????? ????? ????? ??????? ?????? ????? ???? ??????? ?????? ??????? ?????? ?? ??????. ???? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ???? API ?????? PSB ???? 1500 ??? ???? ?? ???????? ??????? ?? ???????? ????????? ?????? ???????? ??????? ??? ?????? ??????? ????? ?????? ???? ??? ?????.