???? ???? ????? GGG40 - ???? ?????? ??????? ???? ??????

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