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