???? ??????? Awwa C500: ?????? ????? ?????? ?????? ??????

?? ???? ??????? Awwa C500 ?????? ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?? ???? ???? ?????? ???? ????????? ?? ????? ??????? ?????? ?????????. ?? ????? ??? ?????? ????? ??????? ????? ????? ?????? ????????? (AWWA) C500? ??? ???? ???????? ??????? ?????? ???? ??????? Awwa C500 ???? ??? ?????? ??? ????? ??????? ???????? ???????? ????????. ??? ????? ????? ?????? ??????? ???? ?????? ????? ???? ???? ??????. ?? ????? ??? ?????? ?? ???? ????? ??????? ??????? ??? ???? ??? ????? ???????? ??????? ????????? ?????? ??? ?????? ?????? ?????? ??????? ??? ?????? ??????? ??????? ????????. ???? ????? ?????? ??????? ???????? ??? ???? ??????? Awwa C500 ?? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ???? ??????? ??????? ?? ??? ??????? ???????? ?????? ?? ??????. ???? ??????? ?? ????? ?? ???? ????? ??? ?????? ?????? ???????? ?????? ??????? ?????? ?????? ???