斜面与联接套的齿盘接触可滑动，形成空回程，扭螺丝速度快。

The fluted disc on the connecting sleeve is contacted and glide with the diagonal face to form zero return stroke. The speed of tweaking screws is high.

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锅炉采用三盘管结构，烟气三回程，设计紧凑，节能空间。

Triple coil structure is adopted for the boiler with three-pass smoke and flue, compact design and energy-saving space.

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锅炉采用三盘管结构，烟气三回程，设计紧凑，节能空间，增加空气预热器时热效率最高可达92%以上。

Triple coil structure is adopted for the boiler with three-pass smoke and flue, compact design and energy-saving space. The air pre-heater is added to enhance the heating efficiency up to 92% or more.

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