???? ??? BS1868 ??????? - ????? ??????? ??????? ?????? ??????

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