Simple past and past participle of peen.

• Hammered metal to shape, smooth, or harden with a peen.

peen 的一般过去时和过去分词。

• 用锤的圆头反复捶打金属以成形或强化。

Worked, shaped, or hardened by peening or shot peening.

• Of metal: finished by striking with a peen.

通过喷丸或锤击整形而成形、硬化或精整的。

• 指金属：用锤的圆头敲击后处理过的。