?????? ????? ASME 300# BC ???? ????? ?? ??????? ??????? ??????? ?? ?????

???? ????? ASME 300# BC? ??????? ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd.? ?? ???? ???? ?????? ?????? ??? ????? ???? ?????? ?????? ?? ????? ????????. ???? ??? ?????? ????? ??????? ANSI/ASME B16.34? ??? ???? ?????? ?????? ?? ????? ????????? ????????. ???? ??? ?????? ?? ???? ????? ?????? ?????? ??? ???? ??? ???? ????? ??? ????? ??? ??? 300 ??? ??? ???? ?????. ???? ????? ????? ??????? ??????? ????? ??????? ?????? ?????? ?????? ?????? ?????. ???????? ??? ?????? ???????? ????? ???? ????? ASME 300# BC ??????? ?????? ??????? ???????? ??? ????? ??????? ????????? ?? ???????? ??????. ???????? ???????? ????? ??????? ??????? ????? ?? ????????? ??? ?? ??? ????? ?????? ??????????????? ??????? ?????? ??????. ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ????? ??????? ????? ????? ASME 300# BC ??? ????????. ???? ??????? ?????? ?????? ??????? ????????? ????????? ???????? ???? ??????? ????? ?? ???? ???????? ???? ????? ??? ?????? ???????? ?????? ???