???? Sch40 ????? ?????? ????????? ???????? | ???? ????

??? ???? ???????? ????? ?? ???????? ????? Sch40 ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd.. ?? ????? ??? ????????? ????? ?????? ???????? ???????? ???????? ???? ????????? ??? ???? ??????? ??????? ?? ?????? ????????? ????????? ??? ?? ????? ????? Sch40 ?????? ??? ???? ????? ???????? ???? ????????? ??? ???? ????? ????? ????? ???? ??????. ???? ??? ????? ??? ??? ??????? ?? ????? ?? ?????? ?????? ??? ??????? ?? ???? ?????? ????????? ???????? ?????? ??? ?????? ?? ???? ?????? ????? Sch40 ?????? ??? ?????? ?????? ??????? ???? ????? ????? ??????? ??? ?????? ?????? ??????? ????? ?? ???????. ?????? ?? ???????? ??? ?? ??? ????? ?????? ??????????? ???????? ??? ?????? ?????? ?????? ??????? ???????? ????? ????? Shijiazhuang Deye Piping Industries Co., Ltd. ????? ???? ????? ?????? ???????? ???????. ?? ?? ?????? ???????? ?? ????? ?????? ???????? ?? ?????? ?????? ????????. ???? ??? ????? ?????? ?????? ?? ????? Sch40 ???? ?????? ??? ????????? ?? ????????