【Daily Question】2015.10.28 Welding Records (2 wealth points for replying, +3–8 additional wealth points for a correct answer)

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The Machinery Section has introduced the 【Daily Question】 feature, which not only fosters an active atmosphere for technical exchanges and guides the direction of such exchanges, but also provides users with financial rewards to help them experience various cool features. Multiple-choice question: The welding records required by the code shall include the following ( ) welds. A, Class A B, Class B C, Class C D, Class D E, Class E Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation or discussion of the knowledge points related to this question, please reply or leave a comment in this post to let us know, and we will have a moderator award you charisma points. 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, the second-to-last +2 charm, and so on, with the highest score earning +5 charm. http://bbs.hcbbs.com/thread-1381938-1-1.html Earning wealth by inviting friends http://bbs.hcbbs.com/thread-1389240-1-1.html [Mechanical Section] Collection of essential knowledge 【Seeking manufacturer sponsorship】 (long-term campaign)