提交：单阶段优化和两阶段的对比。
提出了一种变电站两阶段优化规划方法。
This paper proposes a practical two-phase approach to substation optimization planning.
研究了熔融缩聚和固相缩聚阶段优化该瓶片内在品质的措施；
The measures that optimizing the internal quality of bottle grade chip in the melt polycondensation and SSP stage were studied.
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