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??? ?????? ?????? ???? ????? Din Pn16 ???? ??????? ????? ?? ?????? ??????? ?? ??? ???? Shijiazhuang Deye Piping Industry Co., Ltd? ??? ?? ????? ???? ????? ??? ????? ????? ?????? ??????? ????? ?? ?????????? ??? ?? ??? ??????? ?????? ?????. ? ?????? ????? ?????. ?? ????? ???? ????? Din Pn16 ???? ?????? ?????? ??????? ??? ?????? ?? ????? ????? ??? ???? ???? ??????? ???????? ??? ?? ????? ???? ????? ????? ??? ????? ???????? ????? Pn16? ??? ???? ????? ??? ???? ????? ????? ??????. ???????? ??? ???? ??? ??? ??????? ????????? ??? ????? ???? ?????? ?? ??? ??????? ??????? ????????? ???????? ?????? ??? ?? Shijiazhuang Deye Piping Industry Co., Ltd.? ??? ??????? ?????? ??????? ??????? ????? ???? ????? ??????. . ??? ???? ????? Din Pn16 ????? ??? ?????? ????? ??? ??????? ?? ?????? ????????? ?? ????? ????????. ???? ??? ????? ?????? ?????? ?? ???? ????? ????? ??? ???? ???? ?? ???? ???????