plain carbon steel tool(Using such high-speed steel tools, metal parts can be machined many times faster than by the use of plain carbon steel tools. 使用这种高速钢刀具切削金属部件的速度比使用普通碳素钢刀具快许多倍。)
high-speed steel tool(Using such high-speed steel tools, metal parts can be machined many times faster than by the use of plain carbon steel tools. 使用这种高速钢刀具切削金属部件的速度比使用普通碳素钢刀具快许多倍。)