???? ????? 13 ????? EN558 ???? ?????? ?????? ?????? ?? ??????

?? ???? ??????? En558 Series 13 ???? ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ?? ???? ?????? ?????? ?????? ?? ?????? ?? ?????? ?????? ?? ????????? ????????. ?? ????? ??? ?????? ?????? ???????? ??????? ?????? En558 13? ??? ???? ?????? ?????? ????????. ?? ????? ???? ??????? ??? ?????? ????? ????? ?????? ????? ??????? ?????? ???????? ?????. ???? ?????? ??????? ????? ?? ??????? ??? ?? ??? ????? ??????? ??????? ??????? ??????? ??? ?????? ?????? ????? ??????????? ?????? ?? ????????? ?????? ???? ??????? En558 Series 13 ?????? ????? ?????? ?????? ??????? ??????? ???????. ??? ?? ?????? ?????? ??????? ????????? ??? ???? ????? ???????? ???????. ???? ??? ???? ?? ?????? ??????????? ??? ??? ?????? ?????? ??????? ?? ??????? ???? ???? ??? ???? ???? ???????? ????? ?????? ?? ??????? ?? ?? Shijiazhuang Deye Piping Industries Co., Ltd. ??????? ??????? En558 Series 13 ????? ?????? ???? ???? ?????? ??????? ????? ???? ????? ?????. -???? ????