Conditioning: the treatment of paper, either exposure to atmospheric conditions or by "paper conditioning machine". So that its moisture content matches the ambient atmosphere.

调湿：让纸张和空气接触或使用调湿机使它的水份含量和环境大气相等的处理方法。

youdao

In addition the company also produces the air blower plate tube, the new atmosphere unit, the combination air conditioning unit and so on the central air conditioning terminal equipment.

此外公司还生产风机盘管、新风机组、组合空调机组等中央空调末端设备。

youdao

Plants release moisture into the air alleviating the dry atmosphere generated by air-conditioning and central heating units, as well as computers.

CNN: Office foliage for feel good factor