???? ???? DBB ???? ?????? ????????? ???????? | ????? ????

???? ????? DBB ?? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ???? ?????? ?????? ????? ???? ??????? ????? ?? ????????? ?? ?????? ????? ?????? ??????????????? ????????? ???????? ??????. ?? ????? ??? ?????? ?????? ?? ?????? ???????? ???????? (DBB) ?????? ????? ???? ???? ??? ?????? ???? ??????? ???????? ??? ????? ?????? ??????? ?? ?????? ?? ??????? ???????? ??? ????? ?? ???? ??????? ????? ???? ????? DBB ????? ??????? ?????? ?????? ??????? ???????? ??? ???? ??? ???? ???? ??? ?? ???? ??????? ???????. ????? ?????? ?????? ??????? ??????? ???? ?????? ?????? ?????? ????????? ????????. ?? ?????? ??????? ???????? ??????? ??? ??? ?????? ???? ??????? ????? ??????? ??????? ??? ????? ?? ??????? ???????? ??????? ??????? Shijiazhuang Deye Piping Industries Co.,Ltd. ????? ???? DBB ?????? ?????? ????? ?????? ????? ?????? ?????? ?? ???????? ????? ?????? ?????? DBB ??? ??????? ?? ?????? ???????