???? ??????? B62: ?????? ????? ?????? ????????? ????????

???? ??????? B62 ?? ???? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ?? ???? ????? ????? ?????? ???? ?????? ????????? ????????. ?? ????? ??? ?????? ???? ??????? ?????????? ??? ???? ?????? ?????? ???? ?????? ?????? ???? ??????? B62 ?????? ????? ???? ?? ????? ??? ???? ??????? ?????? ????????? ??? ????? ??????? ??????? ?? ?????? ????? ?? ??????? ????????. ??? ??? ???? ??? ????? ????? ?????? ??? ???? ????? ????? ????????? ????? ?? ???? ?????? ??????? ?????? ??? ?????? ?? ?????? ?? ?????? ???????? ?????? ??????? ??????? ????????. ???? ??? ????? ????? ?????? ??????? ?? ??? ??? ?? ?? ????????? ?? ?????? ?? ????? ??????? ??? ???? ??????? B62 ???? ????? ???????? ??????????? ???? ????? ?????? ??????? ??????? ??? ???? ??????? B62 ?????? ??????? ??????? ??? ????? ?????? ??????????????? ??????? ?????? ?????? ??????. ?? ?? ???? ??????? B62 ????? ????? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ?????? ???????? ???????? ???????? ????