???????? A106gr.B: ?????? ????? ???????? ????? ?????? ????????? ????????

????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? A106gr.B ????? ?????? ?????? ???????? ???????? ???????? ?????? ??. ??? ????? ???????? A106gr.B ????? ??????? ?????? ??? ???? ????? ??????? ?????? ????? ?????? ???? ???????? ?????? ?? ??????? ???????? ???? ??????? ??? ?????? ?????? ????????? ?? ??????? ????? ??????? ?????? ???????. ???? ?????? ?????? ?????? ???????? ??? ????? ?????? ??????????????? ?????? ?????? ???????? ?????? ?????? A106gr.B ????? ?????? ??????? ?????? ???????? ??????? ???????? ????????. ??? ?? ??????? ????? ?????? ???????? ??????? ????? ??????? ?????? ??????? ??????? ???????? ?? ??????? ??? ?????? ???? ???????? ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ?? ?????? ?????? ????? ?????????. ???? ??? ????? ??? ???? ???????? ????????? ??????? ?? ??????? ?? ???????? ??? ?????? A106gr.B ?????? ??? ?? ???????? ??????? ?????????? ????????. ???? ??? ????? ?????? ?????? ?? ???????? ???? ?????? ????? ??????? ???????? ?????? ??