???? ????? API 300# ???? ?????? ????????? ????????

???? ??????? API 300# ?? ???? ????? ???? ?????? ?? ?????? ?????? Shijiazhuang Deye Piping Industry Co.,Ltd. ?? ????? ??? ?????? ?????? ?? ???? ??????? ?? ?????? ????? ?? ?????????? ??? ?? ??? ????? ????? ?????? ???????? ??? ?? ????? ???? ??????? API 300# ????? ????? ????? ???? ???? ????? ?? ??????? ??????. ??? ????? ?????? ???? ????? ????? ??????? ??? ????? ??????? ??????? ????? ?????? ?????? ??????? ???????? ????? ???? ??????? ??? ?????? ?????? ???????? ??? ?????? ??????? ?????. ?? ??????? ????? ????????? ??????? ???????? ?????? ???? ?????? ?? ??? ??????? ?????? ?????? ?? ??????? ????????? Shijiazhuang Deye Piping Industry Co.,Ltd. ????? ?????? ?????? ????? ??????? ??? ?? ??? API 300# Plug Valve? ?????? ???????? ???????. ?? ??????? ??? ???????? ???? ???????? Shijiazhuang Deye Piping Industry Co.,Ltd. ???? ?????? ???? ???????? ??????? ??????? ?????? ???????