以下为句子列表：
英文: The production practice showed that, as along as adopting hi-quality ductile iron castings which has reasonable chemical composition including proper alloying elements and satisfactory as-cast structure, and adopting effective heat treatment process, the
中文: 生产实践证明：设计合理的化学成分，经过适当的合金化，铸造优质的球铁毛坯，采用有效的热处理工艺，可大幅度提高等淬球铁的综合力学性能，稳定生产高韧性等淬球铁铸件。
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