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This post was last edited by Yunmu on 2019-5-5 08:19 in 【Process Engineering Section – Chemical Components Discussion Forum – Daily Question – Question 05-05】. Commonly used locking devices in chemical engineering design include double nuts, ( ), lock washers, and split pins. Notes for filling in the blanks: Questions are valid only on the day they are posed (3 correct answers and 1 wrong answer; posts filled with irrelevant content will be deleted). Responding to old posts on a large scale is considered posting spam, and such responses will not earn any points or may be awarded points at the discretion of the organizers. The spring washer section is about to move on to the next topic. You can send the question bank related to chemical engineering software (along with answers) to my email at 12315827@qq.com. Once it’s included, a reward of 10–100 wealth points will be given based on the quality and quantity of the questions. If you have a large number of questions, feel free to contact me via the in-site messaging system; rewards will be provided collectively, and they’re not limited to wealth points only. The question bank can be used as a source for the “One Question per Day” section in the chemical engineering software category. Questions are allocated on a first-come, first-served basis, with rewards determined by the first email received. Please include the forum username and UID in the email subject.