???? ????? ?????? ?????? ??????? PN63 ?? ????? ?????? ??? ???? ????? ??????

????? ???? ??????????? ??? ??????? ???????? ???????? ?? ????? ?????? ?????? ??????? PN63 ????? ??????. ????? ??? ???????? ?????? ?? ???? ??????? ???????? ?? ????? ????????? ????????. ????? ??? ???????? ?? ???? ????? ??? ??????? ??????? ????? ???????? ???????? ???????? ???????? ????? ???? ????? ???? ???? ????. ????? ?????? ??????? PN63 ????? ?????? ???????? ??? ?????? ?????? ????????? ?????? ?????? ????????. ??? ?????? ????????? ?? ?????? ????? ?????? ??????????????? ??????????? ?????? ??? ???? ??????? ?????? ??????? ?????? ?? ?????? ????? ???? ???????. ????? ???? ??????????? ??? ??????? ???????? ???????? ?????? ??????? ??????? ????? ?????? ????? ??????. ?? ?????? ?????? ?????? PN63 ?????? ??? ????????? ?????? ?????? ?????? ???????? ??? ???? ????? ?????? ?????? ?????????? ??? ?? ??????? ?????? ??????? ???? Shijiazhuang Deye Piping Industries Co.? Ltd. ????? ???????? ???? ?????? PN63 ?????? ?? ?????? ????? ?? ?????? ???????