regiones laryngea
咽喉区 bottle-neck section
第三间隙〔指喉区 teriary stricture
耳喉鼻头颈部区积雪草 Indian Pennywort
眼耳鼻喉诊疗区 ENT Medical Area
无氧化段由入口密封室，废气预热区，直接加热区，炉喉，废气排放系统组成。
The non-oxidizing zone is consisted of entry sealed room, waste gas preheating zone, direct heating zone, and furnace nozzle and flue gas exhausting system.
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