???? ????? ??????? SDSS ??????? ?? ?????? ??????? ?? ??????

???? ?????? ????? SDSS ?????? ???? ???? ?????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ????? ??? ??????? ?????? ???????? ????? ????????? ??? ?? ??? ????? ??????? ????????? ??????????? ?????????? ???????. ????? SDSS ?????? ??? ?????? ?? ??????? ??????? ????? ???? ?????? Super Duplex? ????? ???? ?????? ?????? ?????? ???? ?????. ??? ????? ????? ??????? ??????? ????? ????? ???? ?????? ??? ?????? ?????? ????????? ?? ????????? ??????. ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd.? ????? ?????? ??????? ??????? ????? ?????? ????? ?????????. ??? ????? ????? SDSS ?????? ??? ????? ????? ???????? ????? ????????? ????? ????? ????????? ???????. ???? ??? ????? ??? ????? SDSS ?????? ????? ?? ???? ???????? ?? ????? ?? ????????? ????????? ????? ???????? ??? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????? ???? ???????? ??????? ???????. ???? ??? ????? ?????? ?????? ?? ????? SDSS ?????? ??? ???? ???? ?? ???? ???????.