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http://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pnghttp://bbs.hcbbs.com/static/image/hrline/line7.pngRecently, after attending training on the safety management of special equipment, I have come to realize that only by having a thorough understanding of relevant knowledge can one better manage production processes. Since June, we have been holding a daily quiz on knowledge related to the safety management of special equipment, and we invite all members of the community to participate actively. Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Multiple-choice question: The flange connections should be concentric with the pipes, and the flanges should remain parallel to each other; the deviation shall not exceed （）% of the outer diameter of the flange, nor shall it be more than 2 mm. A、 0.1 B、 0.15 C、 0.2 D、 0.25 Correct answer: B http://bbs.hcbbs.com/static/image/hrline/2.gifhttp://bbs.hcbbs.com/static/image/hrline/2.gif [Production and Management Section] Seeking moderators and technical discussants to join; Notice regarding the “I’m Saving Energy, Where Are You?” event in the petrochemical sector