????? ??? ????? ?????? ANSI 300 ??? - ?????? ????? ??????

???? ???? ??????????? ??? ??????? ???????? ???????? ?????? ????? ????? ????? ?????? ?? ???? (300 ???). ????? ??? ??????? ?????? ???????? ?????? ??????? ?? ??????? ????????? ?????? ??????? ????? ??????? ????? ?? ????? ????????? ????????. ????? ????? ????? ?? ???? (300 ???) ?? ???? ????? ?????? ????? ??????? ??????????. ????? ??????? ?????? ???? ????? ?????? ??????? ????????. ????? ??????? ?????? ???? ????? ?????? ??? ?????? ?????? ??????? ????? ?? ???????? ????????. ???? ??????? ??????? ?????? ?????? ???????? ???? ????? ????? ????? ?????? ???? (300 ???)? ??? ???? ????? ?????? ??????. ???? ??? ??? ?????????????? ?? ????? ?????? ?? ?????? ?????? ?? ?? ??????? ?????? ????? ??? ????? ????? Ansi 300lbs ?????? ??? ?? ?????? ?????? ?????? ???????? ?????? ?????? ??????? ?????? ????? ?? ????????? ?? ?????? ???? ???? ??????? ????? Shijiazhuang Deye Piping Industries Co.? Ltd. ??? ??????? ?????? ?????? ????? ?????? ????? ????? ??????