Basic Knowledge of Ammonia Synthesis – One Question per Day 78
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Multiple-choice question: The setting pressure of a safety valve is generally () times the normal pressure. A、1.1-1.2, B、1.05-1.2, C、1.05-1.1, D、1.1-1.3. We hope fellow sea lovers will participate actively: handshake; the first 50 responders will definitely receive a reward. Please reply with the answer hidden; otherwise it will be invalid. Hidden method: http://bbs.hcbbs.com/thread-492556-1-1.html Please do not edit the content after replying: L. Reference answer: C
This post was last edited by hangjianmjd on 2011-4-2 22:30 ........................
Reply 1# Yan Qiusheng C