名词
中文翻译：打孔比率
同义词：
['notch ratio', 'notch index']
例句：
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1.The engineer used a notching tool to create the intricate design.
工程师使用打孔工具创造了复杂的设计。
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2. The notching ratio of the gears was crucial for the smooth operation of the machine.
齿轮的打孔比率对于机器的平滑运行至关重要。
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3.The notching ratio of the steel is an important factor in determining its strength and durability.
钢的打孔比率是决定其强度和耐用性的一个重要因素。