???? ???? S31803/S32750 ???? ?????? ????? ?????

?????? ?????? S31803/S32750 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ???? ????????? ?? ????????? ???????? ????? ?????????. ??? ?????? ?????? ????? ?? ??????? ??????? ????? ??????? S31803/S32750 ???? ??????? ????? ???? ?????? ????? ?????? ?????? ????????? ??????? ?????? ?????? ?????? ????? ????? ??? ???? ??????? ??? ?????? ????? ?????? ?? ?????? ?????. ??? ???? ????? ????? ???? ?? ?????? ?? ???? ???? ??? ???? ????? ??????? ???????? ??? ????? ??????. ????? ?????? ?????? S31803/S32750 ??????? ??????? ????? ?? ?????????? ??? ?? ??? ????? ?????? ????????? ?????????? ????????? ???????? ?? ?????? ?? ??????? ??????? ????? ???????? ???? ????? ??? ?????? ?????? ?????? ??????? ??????? ???????. ?? ?????? ???? ?????? ??????? ??????? ?? ????? ?????? ?????? ?????? ?????? ?? ??????? ??????. ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ?? ?????? ?????? ????? ????? ??????? ??? ?????? ?????? ??????? ?? ????? ???????? ????????