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1. The process of premelting is crucial for the quality of the final product.
预熔化过程对于最终产品的质量至关重要。
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2. During the premelting stage, the material undergoes a series of chemical reactions.
在预熔化阶段，材料经历一系列化学反应。
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3. The premelting temperature of the alloy is critical for its performance and durability.
合金的预熔化温度对其性能和耐用性至关重要。