密封科技：公司有氢气液化用超低温制冷氦气压缩机-密封垫等新研发产品并已少量供货

Group 1 - The company is currently engaged in hydrogen energy-related businesses, including ultra-low temperature refrigeration helium compressors for hydrogen liquefaction, diaphragm compressors for hydrogen refueling stations, and high-speed gas bearings for hydrogen fuel cell pumps [2] - The revenue from these hydrogen energy-related products is currently low as the company is still in the market development phase [2] - The company is also researching additional hydrogen energy technologies, such as metal bipolar plates for hydrogen liquefaction, sealing gaskets for hydrogen engines, and solid oxide hydrogen fuel cells [2]