???? ????? PN16 ???? ?????? ?????? ?? ?????? ???? ????? | ????? ????

??????????? ??? ???????? ???????? ????????. ???? ???? ????? PN16 ???? ?????? ???? ????? ????? ?? ?? ????????? ???????? ????????. ???? ??????? PN16 ????? ?????? ?? ?????? ?? ???? ???????? ??? ???? ????? ????? ??????? ???????? ???? ????? ???? ??????? PN16 ????? ??? ???? ??????? ?????? ?????? ??????? ????? ??????? ??????? ???? ?????. ????? ?????? ?????? ???? ??????? ??? ???? ?? ????? ?????? ???????. ??? ?? ?????? ????? ????? ??????? ??????? ??? ????? ??????? ????? ?? ????????? ??? ?? ??? ????? ?????? ??????????????? ??????? ?????? ???????? ?????? ???? ??????? PN16 ?????? ????? ?????? ?????? ??????? ????? ??? ???? ?????? ????? ???? ???? ??????. ?? ???????? ?????? ?? ?????? ???????? ??????? ??????? ??? ???? ??????? PN16 ????? ??? ?????? ??????? ????? ??????? ????? ??????? ?? ???????? ????????? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ??????? ??????? PN16 ????? ?????? ???? ???? ????????? ????????