20170525 Catalytic Cracking, Coking, and Reforming Edition 【One Question per Day】 Benefits Section

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To thank all marine enthusiasts for their support of this section, we are launching a new round of activities as a way to give back to everyone. “\"One question per day, special offers section\" – this campaign will have posts published irregularly, 1-5 times per month. Please pay close attention to the \"Catalytic Cracking, Coking, and Reforming Edition\" page and follow me closely to avoid missing out on great opportunities to earn money: lol. Before participating in the campaign, please read the rules carefully: 1. A reward of 5 wealth points for participation, and 15 wealth points for correct answers ； 2. After answering, hide the ** – there will be a number following it; floors whose last digit matches this number will receive an additional 15 wealth points as a reward ； 3. Each person is allowed to reply only once; those who deliberately post repeatedly will be dealt with, you know what I mean:@ ； 4. The topics presented in this post are not subject to any restrictions ； 5. The validity period of this post is 96 hours; no rewards will be given after it expires ； 6. The owner of this post holds all rights to interpretation. Note: Going forward, ratings for this post will be given uniformly after 3 days! ! ! http://bbs.hcbbs.com/static/image/hrline/5.gif Fill-in-the-blank question: According to the \"Safety Specifications for Special Operations in Chemical Production Units\" GB30871-2014, earthwork operations refer to activities such as digging, piloting, drilling, trenching, and driving ground anchors at a depth of more than ( ) meters ； Operations such as filling soil or leveling the site using construction machinery like bulldozers and rollers, which may have an impact on underground utilities. Correct answer: 0.5 Lucky number: 5