So air contactors for direct air capture have this unique characteristic design, where they have this huge surface area, but a relatively thin thickness.

因此，用于直接空气捕获的空气接触器具有这种独特的特征设计，它们具有巨大的表面积， 但厚度相对较薄。

They learned about the product characteristics, design and development, the number of orders, intellectual property rights protection, supply and procurement situations of companies, and their current difficulties.

了解企业的​​产品特点、设计研发、订单数量、知识产权保护、供应采购情况以及目前面临的困难。