down-draft furnace 倒焰炉

natural draft furnace 自然通风炉 ; 自然抽风式炉

forced draft furnace 压力通风炉

up-draft furnace 向上通风炉

straight-draft furnace 直接通风炉

balanced draft furnace 具有引风及鼓风的平衡通风炉膛

furnace draft 炉膛负压 ; 炉膛通风

furnace draft control 炉膛压力控制 ; 炉引风控制

natural draft pit furnace 自然通风地坑炉