Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.

为了使凿刀和刨子好用且安全，必须保证他们的刃足够锋利。

youdao

Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.

为了使凿刀和刨子好用且安全，必须保证他们的刃足够锋利。

youdao