Product ground by grinding material with abrasive belt of grit 320# to produce continuous grinding lines.
Product ground by grinding material with abrasive belt of grit 320# to produce continuous grinding lines.
用粒度适当粒度的砂带拉丝成连续的线条。
Product ground by grinding material with abrasive belt of grit 320# to produce continuous grinding lines.
用粒度适当粒度的砂带拉丝成连续的线条。