???? ???? ??????? Thrf ??????? ??????? ??????? ??????

?????? ???????? ???????? ????? ?????? ???? ?????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ????? ????? ????? ?? ??? ???????? ??? ??????? ?? ????? ?????? ????? ?? ???? ???????? ??????? ?????? ?????? ???????? ????? ???????? ??????????? ????? ????? ????? ????? ?? ??????? ??? ??????? THRF (??????)? ????? ?? ??????? ?????? ????? ??? ?????? ?????? ????????. ???? ??????? ??????? ???????? ?????? ?????? ???????? ???? ??????? THRF ?????? ??? ?????? ?????? ????????? ??? ?????? ?????? ?????? ??????? ??????? ?????????? ????????. ?? Shijiazhuang Deye Piping Industries Co., Ltd.? ??? ??????? ?????? ???? ????????? ???????? ?? ???? ?????? ?????? ????? ????????? ?????? ???????. ??? ???? ?????? ?????? ?????? ??????? ??????? ??? ?????? ????? ????? ?? ????? ???????? ???????? ?????? ???? ???? ??? ????? ?????? ?????? ?? ??????? THRF ?????? ?? ???????? ????????. ????? ???? ????? ?????? ????? ???????? ????? ??????