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单词 ball peen
释义

Definition of ball peen in English:

ball peen

noun
  • A peen which is rounded in shape; usually attributive, especially in ball-peen hammer.

Origin

Late 19th century; earliest use found in Edward H. Knight (1824–1883), patent lawyer and expert in mechanics.

 
 

Definition of ball peen in US English:

ball peen

noun
  • A peen which is rounded in shape; usually attributive, especially in ball-peen hammer.

Origin

Late 19th century; earliest use found in Edward H. Knight (1824–1883), patent lawyer and expert in mechanics.

 
 
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更新时间:2025/1/27 14:43:09