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It can improve thermal efficiency effectively by keeping excess air coefficient at optimal value.
维持过剩空气系数在最优值附近，能够有效提高常压加热炉的热效率。
youdao
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It can improve thermal efficiency effectively by keeping excess air coefficient at optimal value.
维持过剩空气系数在最优值附近，能够有效提高常压加热炉的热效率。
youdao