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