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1. From the concrete ducting the hot dirty flue gas enters the booster fan and then passes the inlet of the GGH.
   从混凝土烟道来的热脏烟气通过升压风机，再通过热交换器入口进入热交换器。
2. A case of field balancing of a centrifugal fan is presented to show the method to determine the trial counterweight for balancing.
   介绍某电厂的增压风机转子现场动平衡过程中试重大小及配重方案的选取方法。