[Phase 1 of Time-Limited Quick Response Contest] 058 [Completed]

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Rules: 1. If you want to answer immediately, give a score of +1 wealth to Floor 1 and write your answer in the “Reason for action” field (only the content within parentheses); see the image below for details. 2. One “*” represents 1 Chinese character (or 1 digit), and the answer must match exactly to be considered correct. 3. The first person to answer correctly will receive +10 wealth points; please reply in the comments on floor 2 or below to claim the reward ； 4. The scope of questions covers the commonly used standards and experience manuals for the process and piping fields ； 5. The difficulty level of the questions increases from easy to difficult. 6. Lower-grade students are welcome to participate actively. Question of this issue: 058. What should be used (*****) to separate the heat tracing tube of carbon steel from the stainless steel tube? Standard answer: Non-metallic materials. Winner: lxsylb. This post was last edited by hutom123 on 2009-3-25 at 15:43.]