water-tube boiler with bent tubes
... bent tubes 弯管式水管锅炉 water tube boiler 水管锅炉 water tube boilers 水管锅炉 ...
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... boiler whistle ==> 锅炉汽笛 boiler with bent tubes ==> 弯管式水管锅炉 boiler with large water space ==> 多水量锅炉 ...
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