求翻译：通过空调方案优缺点及使用场所的比较，本工程采用直流式一次回风系统。在此基础上进行空调风系统和机房设计。是什么意思？

This project uses a DC-type air conditioning program advantages and disadvantages of the use of premises, a return air system. On this basis, the air conditioning duct systems and room design.

The air-conditioning program strengths and weaknesses and use of the site, with the wind at a DC-based system. On the basis of this air-conditioning system and room design.

And uses the place through the air conditioning plan good and bad points the comparison, this project uses the direct-current type one time to return to the wind system.Carries on the air conditioning wind system and the engine room design in this foundation.

Through the comparison of air conditioning schemes for advantages and disadvantages and uses the place, this project uses DC-return air system at a time. Air air-conditioner system and room design on this basis.

正在翻译，请等待...