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Source: wikipedia.org
الطريقة القسرية لعمل المدخنة (Info)
لابد من دفع الهواء أو سحبه أو كليهما عندما لا يكون بالإمكان تنفيذ مداخن عالية أو واسعة (مداخن القطارات مثلاً)، وقد يوضع مكان الاحتراق كله تحت الضغط، الأمر الذي يوجب استعمال سماكات أكبر لجدرانه مما يفيد في زيادة العازلية.
