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

?? ????? SDSS? ???? ?????? ???? Shijiazhuang Deye Piping Industry Co., Ltd.? ?? ????? ?? ???? ???? ?????? ???? ????????? ?? ????????? ???????? ????? ?????????. ??? ????? ??? ?????? ???????? ??????? ??????? ????? ??????? ?????? (SDSS)? ????? ???? ??? ?????????? ??????? ??????? ??????. ???? ?????? ????????? ?? ??????? ???? ????? ??? ????? ????? ?????? ?? ???? ???????? ???????? ?? ??? ????? ?????? ??? SDSS ?? ?????? ?????? ?? ??????? ???????? ????? ?????? ?????????? ??????? ???????. ??? ?? ?????? ???? ????? ????? ??? ????? ?? ??????? ??? ???? ???? ????? ?????????? ?? ???????? ??????. ???????? ??? ???? ?? ????? ?????? ?????? ???????? ?????? ????? ??????? ??????? ????? ????? ???????? ????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????? ?????? ????? ?????? ????? ????? ?????????. ???? ?????? ????????? ???????? ????? ?? ??? ?? ?? ??? SDSS ????? ??????? ??????? ???? ????? ??????? ???? ????? ?? ???????? ????????