??????? ??? EN1092-1: ???? ??????? ??????? ?????? ??????

???? ???? ???????? ???? ???????? ??????? EN1092-1 ????? ?????? ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd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hijiazhuang Deye Piping Industry Co., Ltd.? ??? ??????? ?????? ?????? ????? ?????? ????? ????? ??????. ???? ??? ????? ?????? ?????? ?? ???? EN1092-1 ???? ?????? ?? ???? ????? ???????? ?????? ????? ??