???? ??? ???? ????? ???? 300 ??? ?????? ???? ????????? ????????

???? ??????? 300LBS ?? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ????? ??? ?????? ???? ???????? ????? ??????. ??? ???? ??????? ??? ??????? ?????? ?? ?????? ?? ?????? ????? ?? ????????? ??? ?? ??? ????? ?????? ????????? ?????????? ???????????????? ??? ????? ?? ???? ????? ?????? ??? ??????? ???????? ???????? ??????? ????? ?????? ???????? ??? ?? ????? ??? ?????? ?????? ???? ???? ???????. ????? ???? ??????? 300LBS ????? ???? ?? ?????? ????? ???? ?????? ?????? ?? ???? ??????? ??? ??????? ???? ????? ??????? ??????? ????? ???????????? ???? ???? ??????? ??? ????? ???? ????? ???????? ????? ??????. ??? ????? ?? ?????? ?? ??????? ???????? ???????? ?????? ????? ???????? ????????? ???? ??? ??? ????? ?? ???????? ?? ????? ??????? ??? ???? ??????? 300LBS ?? Shijiazhuang Deye Piping Industries Co.,Ltd. ???? ???? ?????? ??????? ????????? ?????? ?? ?????? ??????? ????