???? ???? SDSS ???? ??????: ???? ???? ??????

?????? ?????? SDSS? ???? ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd.? ?? ???? ???? ?????? ???? ?????? ????????? ????????. ????? ?? ??????? ??????? ????? ??????? ?????? (SDSS)? ??? ?????? ?????? ????? ???????? ???????? ??????? ????? ???????? ???????? ??? ????? ??????? ????????? ?? ??????? ??????? ?????????? ??? ?????? ????? ?? ?????? ?? ??????? ???????? ?????. ?????? ??????? ??????? ????????. ?? ????? ?????? ????? ????? ???? ???? ????? ??? ???? ??????? ????? ????? ?????? ?? ???????. ???????? ??? ???? ???? ???? SDSS ????????? ?? ???? ?????? ?????? ????? ?????? ???????? ??? ???? ???????? ????????? ?? ??????? ?????????? ???????? ?????????? ??? ?? ?????? ?????? SDSS ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ????? ?? ?????? ???????. - ?? ???? ?????? ?? ???? ?????? ????? ?? ??????? ??? ?? ??? ????? ?????? ?????? ??????. ???? ????? ?????? ?????? ??????? ??? ??? ?????? ????? ???? ?????? ???????? ????????