?????? Sch80 Smls ????? ?????? ????? ?????

??? ????? ?????? Sch80 Smls ?????? ??? ?????? ???? Shijiazhuang Deye Piping Industry Co., Ltd.? ??? ?????? ??????? ??????? ???????? ????? ??????. ?? ????? ???????? ??? ???????? ????? ?????? ??????? Sch80? ??? ???? ????? ??????? ??????? ??????? ??????? ????? ?? ????????? ????????. ?? ????? ?????? Sch80 Smls ?????? ??? ???? ?????? ?????? ??? ?????? ?? ???? ????? ?????? ???? ??????? ??????????. ?? ????? ??? ???????? ????? ????? ?????? ????? ???????? ??? ?????? ?????? ????????? ?? ????? ???????? ??? ????? ?????? ??????????????? ?????? ??????? ????? ?????? ????? ????????? ???? ?????? ?????? ??? ???? ?????? ?????? ??????? ????? ?? ??? ??????. ???????? ??? ???? ???? ???????? ???????? ????? ??????? ?????? ????? ??????? ????????? ???????? ???????? ?? ???????? ??????? ???? ???????? ???? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? Sch80 Smls ?? ?????? ?????? ???? ???? ??????? ??????? ??????? ?????????. ???? ??? ????? ?????? ?????? ?? ?????? ???????? ???????? ?????