中国石油申请掺氢天然气中氢气浓度检测装置及方法专利，检测高浓度氢气和低浓度氢气时无需更换定量管大小

Group 1 - The core viewpoint of the news is that China National Petroleum Corporation (CNPC) has applied for a patent for a device and method to detect hydrogen concentration in hydrogen-blended natural gas, indicating a focus on advancing technology in the natural gas analysis sector [1] Group 2 - CNPC was established in 1999 and is primarily engaged in oil and natural gas extraction, with a registered capital of 18,302,097 million RMB [2] - The company has invested in 1,297 enterprises and participated in 443 bidding projects, showcasing its extensive involvement in the industry [2] - CNPC holds 38 trademark registrations and 5,000 patent records, along with 168 administrative licenses, reflecting its significant intellectual property portfolio [2]