锅壳式烟管锅炉烟管内置水管的环形螺纹烟道，它涉及锅炉领域。
It is about the ring screw thread smoke channel of the boiler shell type gas tube in the boiler field.
立式水管式废热锅炉在回收大量余热的过程中，会出现局部炉管被烧坏的现象。
When a waste heat vertical water tube boiler recovers waste heat, the fluid in the boiler will be changed from liquid into gas.
立式水管式废热锅炉在回收大量余热的过程中，会出现局部炉管被烧坏的现象。
When a waste heat vertical water tube boiler recovers waste heat, the fluid in the boiler will be changed from liquid into gas.
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