?????? ???? PM 2.5

??? ?????? Rika pm 2.5 ?? ???? Hunan Rika Electronic Tech Co.,Ltd ?????? ?????? ?? ????? ???????. ??? ???? ???? ???????? ??????? ????????? ???????? ??????? ?????? ?? ??????? ???? ?????. ??????? ?? ????? ??? ?????? ?????? ????????? ??? ?? ??? ISO 9001 ?CE? ??? ??? ?????? ?????? ???? ??????. ??? ??????? ??? ????? ???????? ?? ????? ???? ???????? ?? ??????? ?????? ?? ????? ??? ???? ?? ??????? ????.

?????? ???? PM 2.5: ???? ?????? ??????? ?? ??? ??????? ????? ?????? ????? ?? ?????? ?? ????? ??????? ?????????. ???? ???? ??????? ???????? ???? ????? ?????? ??????? ?????? ?????? ??? ??????? ??? ????? ?????? ?????? ??? ?????? ???? PM 2.5 ????? ?? ????????. 6 ????? ??? ???? 6 ????? ?? ????? ???? ?????? 5 ????? ??? ???.