????? ?? ????? ?????? PN25 | ???? ??????? ??????? ?????????

?????? ???? ??????????? ??? ?????? ???????? ???????? ????? ??????? PN25? ??? ????? ?????? ????? ?????? ????? ???? ????????. ??? ??????? ?????? ??????? ????? ?? ?????????? ??? ?? ??? ??????? ??????? ??????? ???? ????? ?????? ????? ???????? ????????. ?????? ?? ???? ????? ??????? ????? ????? ??????? PN25 ??????? ????? ??????? ????? ???? ??????? ??????? ???????? ???? ????????. ????? ??? ??????? ???????? ?????? ????????? ??? ?????? ?????? ??????? ?? ??????? ???? ?? ???? ???? ?? ??????. ?? ??????? ??? ?????? ???????? ???? ????? ??????? PN25 ????????? ????? ????? ????????? ??????? ??????? ???????? ?????? ???????. ???? ?????? ?????? ?????? ?????? ??????? ???? ???????? ???????? ?????? ????? ?????? ?????? ?????? ????? ?????? ?? ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ??? ????? ????? PN25 ????? ?????? ???? ???? ????? ??????? ???????? ??????? ?? ????????? ???? ???????? ?????? ??.