以下为句子列表：
英文: Smooth and finish the crankpin to roundness.
中文: 把曲柄销磨光并精加工到正圆。
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英文: The Load map and wearing maps of the crankshaft journals and crankpin are obtained under various operating conditions.
中文: 研究表明：气缸压力和转速升高后，曲柄销和主轴颈的磨损均呈现增加趋势。
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英文: Wearing of crankshaft journals and crankpin is one of the most key indexes for evaluating the working life of internal combustion engine.
中文: 摘要内燃机曲轴轴颈的磨损量是衡量内燃机寿命的一个重要指标。
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