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

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