?????? ???? GGG40 ????? ?????? ????????? ????????

??????????? ??? ???????? Idndustrys Co.,Ltd. ????? ?????? ???? ?????? GGG40 ???? ??????. ?? ????? ?????? ?????? ?????? ??? ?????? ???? ????? ?? ?? ?????? ?????? ?? ????????? ????????. ???? ??? ????????? ???????? ?? ?????? ????? GGG40? ????? ?????? ??????? ??????? ??? ?????? ?????? ????????? ?? ??????? ??????. ????? ?????? ?????? ????? ???? ????? ????? ???? ???? ??????? ????? ???????. ???? ????? ?????? ?????? ?????? ???????? ?? ??????? ??? ??? ???????? ?????? ????????? ?? ?????? ?????? ??????? ???? ????? ????? ?????? ?????? ??????? ??????. ??? ??????? ?????? ??????? ??????? ?? ?????? ??????? ??????? ?????? GGG40 ?????? ??? ???? ???????? . ???? ??? ?? ???? ??? ???? ????? ?? ?????? ???? ?? ???????? ???? ?????? ????? ???????? ??? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ?????? ???? ????? ??????????? ?? ?? ?????? ???????? ?????? ???????? ???????? ???????? ?????? ??. ???? ??? ????? ?????? ?????? ?? ?????? ?????? GGG40 ???? ???? ?? ???? ???????