???? ????? API6D: ???? ??????? ??????? ?????? ??????? ??????? ??????

???? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ??? API6D ????? ?????? ??????? ?????? ???? ????? ?? ????? ?? ????????? ???????? ???????????????? ?????. ????? ?????? ????? ????? ????? ?????? API6D? ??? ???? ????????? ????? ?????? ?????? ???????? ?? ???????. ????? ?????? ????? API6D ????? ??????? ?????? ?? ??????? ??????? ?????? ???? ??????? ????????? ??? ?? ??? ??????? ???????? ???????? ??????? ????? ???????? ????????. ????? ??? ???????? ????? ????? ????? ?????? ?????? ??????? ???????? ??? ?????? ?????? ????????? ?? ?????? ????? ?????? ??????????? ???????????????. ???? ?????? ??????? ???????? ???????? ???? ?????? ????? API6D ????? ??????? ??????? ?? ???????? ????? ??????? ??? ???? ????? ???? ????? ???????? ?????? ?? ??? ???????. ???????? ??????? ???? ??????? ???? ???? ??????????? ??? ??????? ???????? ???????? ?????? ?????? ????? ?????????? ?? ?????? ?????. ??????? ???? ????? ?????? ?????? ?? ?????? ????? API6D ???? ???? ?? ????? ????????.