【Daily Question】7.3 Gaskets Reply +2； To +3 ； Perfect +5

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This post was last edited by ren6602121 on 2015-7-6 09:32. In order to increase the popularity of the container section, the \"One Question per Day\" activity was initiated under the guidance of the leaders, aiming to foster active technical exchanges while also providing financial rewards to users. The following flange types can be used for long-diameter butt-weld flanges with a nominal pressure of 6.4 MPa, ≤450°C, and trapezoidal grooves: (C). a winding pad. b Metal gasket. c Metal ring gasket. d Flexible graphite composite gasket. All of the above: Reply with the answer you think is correct in the comments to participate in the quiz; you will receive +1 wealth point (points are added automatically according to the rules). If your answer is incorrect, no additional points or feedback will be given. If you answer all questions correctly, you’ll get an extra +3 wealth points. Additional rewards will also be given if you provide a detailed explanation or analysis of the questions and answers. If your answer is correct and your explanation is accurate, it will be marked as the best reply (the best assistance). Feel free to answer; please do not reply repeatedly ； If a, b, c, and d are all correct, choose e; answering a, b, c, d, e will result in no points. Note: We will close this post after 24 hours to reveal the answers and explanations, as well as the best response (the best help provided). Attraction Bonus: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator award you +Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights. After registration, we will rank participants based on the content of their posts: the last-place contestant will receive +1 charm point, the second-to-last place +2 charm points, and so on, with the highest score earning +5 charm points. http://bbs.hcbbs.com/thread-1381938-1-1.html Inviting friends to join earns wealth. http://bbs.hcbbs.com/thread-1389197-1-1.html Seeking sponsors for branding