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【Daily Question】Hydrogen Production and Hydrogenation Technology Edition 20190807

2019-08-07View Original

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Participation prize: 1 Fortune, Correct answer prize: 3 Fortune. Single-choice question: For an air cooler equipped with both variable-frequency fans and louvers, which control method should be used first? A. Variable frequency ; B、Blinds ; C. At the same time ; D, choose one. Answer: A Your participation is the greatest support for our work! Giving roses to others leaves a pleasant fragrance in one’s own hands.

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