fire tube

烟管，火管

1. 烟管：fire resisting material耐火材料 | fire tube烟管 | fire tube boiler烟管锅炉

2. 烟管(火管)：锅炉管束 boiler convection tube bank | 烟管(火管) fire tube | 螺纹烟管 spirally corrugated tube

3. 火管：fire shutter 防火卷闸 | fire tube 火管 | fireman's emergency switch 消防员紧急开关掣

4. 火管,烟管：fire suppression 灭火 | fire tube 火管,烟管 | fire tube boiler 火管锅炉