中原内配：公司的空气轴承产品已完成研发工作，目前已在氢能项目子公司的空压机上实现批量化应用

Group 1 - The core point of the article is that Zhongyuan Neipei has completed the research and development of air bearings, which are now being applied in bulk in their hydrogen energy subsidiary's air compressors [2][3] - The air bearing products have not yet started external sales, indicating a focus on internal application for the time being [2]