An air extraction hood must be switched on during operation of the gas cooktop.
一个抽气罩必须开启燃气灶具期间的操作。
Analyses problems in the oil smoke extraction hood structures and propose a solution plan.
分析了目前抽油烟罩产品结构上的不足，提出了解决措施。
Air of kitchen and diesel generator room is exhausted by filter-type extraction hood, which is laid on the roof of the building.
厨房及柴油发电机房排风采用过滤型排气罩，且屋顶排放。
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