???? ??? ???? ?????? BS1868 ??????? ??????

?? ???? ????? BS1868 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ???? ?????? ???? ????? ????? ?? ????????? ???????? ????????. ?? ????? ?????? ???? ??? ?????? ??? ????? ?????? BS1868? ??? ???? ??????? ?????? ???????? ???????. ?? ????? ?????? ???????? ???? ????? ??????? ??????? ??? ????? ??????? ????????? ?? ??????? ??????. ??? ????? ?????? ?????? ???????? ??? ???????? ??????? ?????? ????????? ?????? ???? ????? BS1868 ?????? ??? ???? ???? ?????? ?? ?????? ????? ????? ?????? ??????? ??? ???? ????? ??????? ????? ?????. ???? ???? ?????? ????????? ?? ???????? ?????? ?????? ??? ???? ????? ?????? ???? ???. ???? ????? ?????? ??????? ???????? ??? ???? ????? BS1868 ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ??????? ????????? ???? ????? ?????? ?????? ????????? ??????????. ???? ?????? ????????? ?? ?????? ????? ?????? ??????????????? ?????? ?????? ?????? ?? ???????? ????????? ??? ?????? ????? ?????? ??????????? ????? ??? ???? ??????