zhè bǎ / dāo jù / shì / yòng / fēng gāng / dǎ zào / de / qiē xiāo / sù dù / tè bié / kuài

这把刀具是用锋钢打造的，切削速度特别快。

This cutting tool is made of high speed steel, so it cuts at a very fast speed.