中原内配：公司的空气轴承产品已完成研发工作

Group 1 - The company has completed the research and development of its air bearing products [1] - The air bearing products are currently being applied in bulk in the air compressor of its hydrogen energy subsidiary, Zhongyuan Neipei Mingda Hydrogen Energy Co., Ltd. [1] - The company has not yet initiated external sales for these products [1]