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【Daily Question】Hydrogen production and hydrogenation technology version 20200227

2020-02-27View 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 True or False: When installing a silencer on the steam drum of a heating furnace, open the valve once first, and then slightly open it a second time ; When removing the silencer, close the secondary valve first, then close the primary valve ; Its main purpose is to ensure the tightness of the one-way valve. ( ) Answer: Correct

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