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1.The operation of a heater with poor ventilation; 3.The operation of a heater with good ventilation and air flue being partially blocked; 4 The operation of heater with poor vetilation and air flue partially blocked.
模拟工况有以下几种：厨房空气流通情况下热水器正常使用；厨房空气不流通情况下使用热水器；厨房空气流通情况下，热水器烟道部分堵塞；厨房空气不流通情况下，热水器烟道部分堵塞。收藏指正
2.A shaft, flue, or stack for ventilation or the passage of smoke, especially the smokestack of a ship or locomotive.
烟囱，通风井尤指轮船或机车上的用来通风或排烟的通风井、烟道或排气管收藏指正
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