名词
中文翻译：核心棒
同义词：
['core rod', 'center rod']
例句：
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1. The core rod is essential for the machine's operation.
核心棒对于机器的运行至关重要。
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2. The engineer used a core rod to fix the broken pipe.
工程师用一根核心棒来固定断裂的管子。
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3. The core rod is made of high-quality steel and is durable.
核心棒由高品质钢材制成，耐用。