?????? ????? API BB ??? 600 ??? ??????? - ????? ??????? ???????

???? ????? API 600lbs BB ?????? ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?? ???? ???? ?????? ?????? ?? ???? ????????? ???????? ?????????????? ????. ????? ??? ?????? ?????? ????? ????? ???????? ???? ?????? ?????? ???? ???? ???????? ??? ????? ??????? ??????? ?? ???? ????? ?????? ?????? ??????? ???????. ???? ???? ????? ?????? ????? ??? ??????? ????? ?????? ?????? API 600 ??? BB ????? ?????? ???????. ????? ?? ???? ????? ??????? ??? ??????? ???????? ???????? ??????? ????? ???????? ????????? ?????? ???? ??????? ??????? ????? ???? ????? ?????. ???? ?????? ?????? ?????? ??????? ???? ??? ?????? ?????? ?????? ??????? ???????? ????? ?????? ?? ?????? ??? ????? ?????? ??????????????? ?????? ?????? ??????. ??? ??? ?????? ????????? ????????? ???????? ??? ???? ???????? ???????. ????? ???? ??????????? ?? ?????? ???????? ???????? ?????? ?????? ?????? ?????? ????? ??????? ????? ???? API 600 ??? BB ?????? ?????? ??? ???????? ??????? ???????. ????? ???? ????? ?? ????????? ??? ??? ?????? ??????????.