???? ???? BS1400 ???? ?????? ?????? ?? ?????? ???? ????? | ????? ????

???? ??? ?????? ?????? BS1400 ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd.. ?? ????? ??? ?????? ???? ?????? ?????? ???? ????? ?? ?? ????????? ???????? ????????. ??? ????? ????? ???? ??????? ??? ????? ??????? ?????? ????? ?????? ?????? ??????? ???????? ????? ?????? ?????? BS1400 ?????? ?????? ?????? ???????? ??? ???? ??????? ????? ????? ?????? ?? ??????. ???? ?????? ?????? ????? ??????? ????????? ??? ???? ????? ?????? ?????????? ?????????? ??? ????? ?? ???? ??????? ?????? ??? ?????? ?????? ??????? ??????? ????? ???? ???? ????? ????? ?????? ??? ?????? ??????? ??????. ??? ?????? ?? ?????? ?? ??????? ?????????? ?????? ??????? ??????? ???????? ?????????? ???? ????? ?? ????? ?????? ?????? ????????? ??? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????? ???? ?? ?????? ?????? ?????? ?? ??????? ????????. ???? ?????? ?????? BS1400 ???????? ??????? ??????????? ??? ????? ?????? ?????? ????????? ??????