????????????? ????????????? ???? Flat dies ??????????????????????????????????????????????????????????????????????????????????????????????????????? 2 ???? ???????????????????????????????????? ????????????????????????? ????????????????????????????????????????? ?????????????????????????????? ??????1. ????????????
แผ่นรีดเกลียวที่นิยมในปัจจุบันมีอะไรบ้าง ?
????????????? ????????????? ???? Flat dies ??????????????????????????????????????????????????????????????????????????????????????????????????????? 2 ???? ???????????????????????????????????? ????????????????????????? ????????????????????????????????????????? ?????????????????????????????? ??????1. ????????????