????? ?????? ?????? ????? ??????? En1226

???? ??????? EN1226 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd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hijiazhuang Deye Piping Industries Co., Ltd. ?????? ??? ???? ????? ?????? ?? ?????? ???? ????? ???????? ???????