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1. The new furnace is designed toimprove efficiency and reduce energy consumption.
新炉子的设计旨在提高效率和减少能源消耗。
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2. Thefurnace is essential for the production of steelin this factory.
这个工厂的炼钢厂需要这种炉子。
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3. The furnace was used tomelt the iron ore, which isthen processed into steel.
这种炉子被用来熔化铁矿石，然后将其加工成钢铁。