???? ???? ???? ????? Class600 LBS ???????? ?????? ??????

???? ??????? ??? 600 LBS ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ???? ????????? ???????? ???????. ?? ??? ??? ??? ??? 600 ???? ??? ???? ??????? ??? ??????? ?????? ?? ???? ?????? ????? ?? ???????? ??? ?? ??? ????? ?????? ??????? ??? ????? ?? ???? ????? ??????? ??????? ??? ?? ????? ???? ??????? ??? ?????? ????? ??????? ???????. ????? ????? ?????? ???? ????? ?? ??? ??? ??? ???? ????. ????? ?????? ????? ????? ???? ???? ????? ?????? ????? ?????? ????? ?? ????? ????? ??????? ?????? ???? ??????? ??? 600 ??? ?????? ???????? ?????? ?????? ?????????? ???????? ?????? ????????? ??? ????? ????? ??????????? ? ???????? ?????? ????????? ?????? ????????. ???? ?? ???????? ?? ????? ?????????????? ?? ????? ????? ?????? ?? ????? ?????? ??????? ??? ?? ????? ??? ?????? ?????? ????? ???? ?????? ??? ????? ?? ??????? ?????? ?????????? ???????? ????????