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?????? ?????? ?? ??????? ?????? BW ?????? ?? ???? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ?? ???? ???? ?????? ?????? ?? ???? ?????? ????????? ????????. ????? ??? ?????? ?? ??????? ?????? ????? ???? ??????? ??? ???? ????? ??? ???? ???? ?????? ?????? ????? ?? ???? ????? ??????? ??? ??????? ???????? ???????? ??????? ????? ?????? ???????? ??? ?????? ???? ????? ??????. ???? ???? ????? ?? ?? ??????? ??????. ??? ???? ????? ??????? ?????? ?????? ?????? ??????? ????????? ??? ???? ???? ??? ???? ?? ??????? ????? ??? ?????? ?????? ?????? ?? ?????? ????????? ??? ????? ??????? ????????? ?? ????????? ???? ???? ???? ?????? ?????? ?? ?????? ?????. ????? ?????? ????? ?????? ?????? ??????? ??? ?????? ?????????? ??????? ???????? ????????? ???? ????? ??? ?????? ??????? ??????? ?????? ??????? ??????? ??? ?????? ?????? BW Full Bore ?? ???? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ??? ?????? ??????? ??????? ????? ?? ????????? ????????