?????? ????? ???? ??????? SCH120 ???????? ????? ??????

?? ???? ?? ??????? SCH120 ????? ?????? ????? ???????? ????? ??? ???? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????????. ????? ?????? ?? ????? ?????? ????? ?? ?????????? ??? ?? ??? ??????? ????????? ????????? SCH120 ???????? ??????? SCH120 ?????? ??? ?????? ?? ???? ????? ??????? ??? ???? ????? ????? ??????? ??? ?? ????????? ?????? ??????. ???? ??????? ??????? ???????? ???????? ?? ????? ????????? ?????? ?????? ??????? ????? ????? ??? ?????? ?? ???? ???????? ????? ??? ???? ??? ???? ?? ????? ???? ????? ?? ???? ??????? ???????? ??? ?? ????? ??????? SCH120 ?????? ??? ?????? ????? ?????? ??????? ?? ?????? ??? ????? ?? ????????. ???? ??????? ?????? ???????? ?????????? ??? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?? ????? ?????? ?????? ??? ??????? SCH120 ???????? ???? ???? ???????? ???????. ???? ??? ????? ?????? ?????? ?? ???????? ???? ?????? ??????? ?? ????? ???????? ???????? ?????? ??