普通碳素钢
plain carbon steel
plain low carbon steel
common straight carbon steel
general carbon steel
钨铬钒工具钢
tungsten-chromium-vanadium tool steel
钨铬工具钢
tungsten-chromium tool steel
小六角工具钢
Small hexagonal tool steel
粉末冶金工具钢
Keywordpowder metallurgy tool steel
powder metallurgy tool steel
PM tool steels