???? ????? RF/BW ???? ?????? ?????? ?????? ?? ??????

?? ???? ??????? RF/BW ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ???? ????? ????? ?? ?? ????????? ???????? ????????. ????? ??? ?????? ????? ???? ?? ????? ????? RF ?? BW? ??? ????? ??????? ???????? ???????/??????? ?????????. ??? ?? ?????? ?????? ????? ???? ?????? ??????? ??? ???? ??????? ???????? ??? ????? ??????? ?????? ???? ??????? RF/BW ????? ??? ?? ?????? ?? ??????? ???????? ??? ???? ???????? ?? ????? ???? ???????? ???????? ????????. ??? ?? ?????? ???? ?????? ?????? ??????? ???????? ???????? ??? ???? ????? ??????? ?? ?? ???? ????? ?????? ?????? ??????? ???????. ???? ?????? ????? ?? ?????? ????? ??????? ??? ???????? ??????? ??????????? ?????????? ??? ???? ??????? ?????? ?????????? ????????? ????????? ???? ?????? ?????? ??????? ????? ?????? ???????? ??????? ???? ??????? RF/BW ?? ???? Shijiazhuang Deye Piping Industries Co. ., Ltd. ?? ?????? ??????? ?????? ??????? ?? ?????? ?? ??????? ???????? ??????