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。
Servicing & Cleaning of Exhaust Kitchen Hood, Fan and Ducting.
清除厨房烟罩，风扇，厨房风喉的油迹。
Servicing & Cleaning of Exhaust Kitchen Hood, Fan and Ducting.
清除厨房烟罩，风扇，厨房风喉的油迹。
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