???? ????? ?????? EPDM ???? ?????? ????? ?????

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