Using the air-filled type heat exchanger.
采用风冷式热交换器。
Gas occurrence boiler air-filled type process: the process in gas and water don't contact, greatly reducing the sewage production.
煤气发生炉风冷型工艺：该工艺过程中煤气与水不直接接触，大大减少了污水的产生。
Dry plasma cutting: also called the air-filled type cutting, the air compressor to plank cut in order to achieve the effect of cooling seam jet, such cutting costs low, but pollution is very large.
干式等离子切割：又称风冷式切割，采用空压机对板材割缝喷气以达到冷却效果，此类切割成本较低，但是污染很大。
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