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????? ???? T ??? 600 ??? ?? ???? ??????????? ??? ??????? ???????? ????????? ???? ???? ?????? ???? ?????? ????? ????? ????? ?? ????? ????????. ??? ??????? ?????? ????????? ?? ???? ???????? ???? ????? ????? ??? ??? 600 ???? ??? ?????? ?????? ??????? ????? ?? ????????? ????????. ?????? ?? ???? ????? ??????? ??????? ??? ??????? T ????? ????? ???? ??????? ???????. ???? ??????? ??????? ?????? ??????? ????? ??????? ?????? ????????? ??????? ??? ?????? ???? ????????? ???? ???????? ??????? ?????? ??. ???? ???????? ??????? ??????? ??????? ???? ????? ???? T ??? 600 ??? ??????? ????????? ?????? ?? ???????. ???? ??????? ??????? ???? ???? ?? ??????? ????????? ????? ??????? ???????? ?? ???? ????? ????? ??????? ????? ?????????? ?????? ??? ????? T ?????? ?????? ?????? ???? ?????? Ansi 600 ???? ?? ?? ???? Shijiazhuang Deye Piping Industries Co.? Ltd. ?????? ???? ????? ?????? ???????