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【Daily Question】Hydrogen production and hydrogenation technology version 20200125

2020-01-25View Original

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Participation: Prize 1 Wealth; Correct answer: Reward of 3 wealth points ; Note: This post is valid for 48 hours. https://bbs.hcbbs.com/static/image/hrline/2.gif Wishing everyone good luck in the Year of the Rat! Happy New Year! True or False: The larger the pipe diameter, the lower the flow velocity, and the better the heat transfer efficiency. (  ) Answer: Incorrect

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