通过适当手段，在同一基准之上比较常规乙烯塔系和热泵乙烯塔系的能耗差距。
Comparison is done for energy consumption between conventional ethylene tower system and heat pump ethylene tower system on the same basis through proper ways.
通过适当手段，在同一基准之上比较常规乙烯塔系和热泵乙烯塔系的能耗差距。
Comparison is done for energy consumption between conventional ethylene tower system and heat pump ethylene tower system on the same basis through proper ways.
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