????? ???? ???? ???? ???? ???????? ???? ??? ????? ?? ??????? ?? ??? ????? ?? ?????? ?? ????? ???? ?? ??? ???? ?? ??? ???? ?? ???? ???? ?? ????? ????. The variation in the producing process of these, and the quality control of the TMT bars, eventually contributes to Value discrepancies. ???? ????? ?? ?? ????? ?? ??? ?? ???? ?? ???? ??, ????? ???