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【Process Engineering Division – Pipe and Valve Technology Exchange Section – Daily Question – Questions 04–22】 For the connections between horizontal pipes in drainage systems, as well as between horizontal pipes and vertical pipes, it is advisable to use 45° elbow fittings or 90° diagonal elbow fittings. ( ) Judgment: Right. Note: Questions are valid only for the day they are posed (3 correct answers and 1 wrong answer; posts filled with irrelevant content will be deleted). Responding in large numbers to previous posts is considered spamming, and such responses will not earn any points or may be scored at the discretion of the organizers. The next topic will be updated soon. You can send the question bank related to chemical engineering software (along with answers) to my email at 12315827@qq.com. Once it is included, a reward of 10–100 wealth points will be given depending on the quality and quantity of the questions. If you have a large number of questions, you can contact me via the in-site messaging system; rewards will be provided collectively, and they are not limited to wealth points only. The question bank will serve as the source for the “One Question per Day” section in the chemical engineering software category. First come, first served – rewards will be granted based on the first email received. Please include the forum username and UID in the email subject.