???? ??????? Saf2507: ???? ????? ??????? ??????

????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ????? SAF2507 ????? ?????? ?????? ????????? ????????. ?? ????? SAF2507 ?????? ??? ?????? ?? ??????? ??????? ????? ??????? ??????? ??? ?????? ?????? ?????? ?????? ?????? ??? ???? ????? ????? ????? ??????? ???????? ??? ?? ????? ??? ??????? ?????? ????? ??? ????? ?? ??????? ??? ???? ???? ??????? ??????? ??????. ???? ?????? ????????? ?? ???????? ?????? ??? ????? ?????? ????????? ?????????? ?????????? ???????? ?????? ????? ??????? SAF2507 ?????? ??? ?? ?????? ?? ??????? ?????????? ?????? ?????????? ??????? ????????. ???? ??? ?? ???? ????? ?????? ????? ???????? ?? ????????? ??? ??? ?????? ?? ????? ???????? ????????? ??? ????? ??????? ?????? ??? ?? ???? ?????? ????????? ??????? ?????? ??? ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd.? ??? ??????? ?????? ?????? ?? ?????? ?????? ??????? ???? ???????. ???? ??? ????? ?????? ?????? ?? ????? ??????? SAF2507 ???? ???? ?? ???? ???????