名词
中文翻译：球头
同义词：
['ball head', 'ball pein例句：1. The ball peen is a crucial component in the construction of the bridge.（球头是桥梁建造中至关重要的部件。）']
例句：
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1. The ball peen is a crucial component in the construction of the bridge.
球头是桥梁建造中至关重要的部件。
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2. The ball peen was used to secure the joints in the wooden frame.
球头用于固定木框的接缝。
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3.The ball peen was removed from the machine before it could be repaired.
在机器无法修复之前，已经从机器中取出了球头。