金剛(gang)石(shi)(shi)砂(sha)輪,超(chao)硬(ying)磨料(liao)磨具,CBN砂(sha)輪,藍寶(bao)石(shi)(shi)行(xing)業(ye)背減薄砂(sha)輪,藍寶(bao)石(shi)(shi)行(xing)業(ye)倒角砂(sha)輪,藍寶(bao)石(shi)(shi)行(xing)業(ye)樹脂銅盤(pan)等