???? PVC: ???? ?? ??????? ??????? ????? ???????? ????? ??

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