【Daily Question】Catalytic Coking Reformate Blending Version 20180423

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Participation: Reward of 3~5 Wealth points； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Single-choice question: Using the sealed medium itself to flush the mechanical seal is called (　　). A. Self-flushing B. External flushing C. Circulating flushing D. Other flushing Methods. Answer: A. Your participation is the greatest support for our work. Giving roses to others leaves a pleasant fragrance in one’s own hands. https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be released automatically after two days. “My Device, My Home – Large-Scale Original Photo Sharing Event (Part 2) https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1868167&extra=page%3D1 【Q&A】Summary Post on Catalytic Coking and Reforming Oil Blending for 2017 https://bbs.hcbbs.com/thread-1826018-1-1.html 【Daily Question】Summary Post on Catalytic Coking and Reforming Oil Blending for 2017 https://bbs.hcbbs.com/thread-1811219-1-1.html